diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index a5c3ae1..05e5219 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -11,6 +11,7 @@
             <option value="$PROJECT_DIR$" />
           </set>
         </option>
+        <option name="useAutoImport" value="true" />
       </GradleProjectSettings>
     </option>
   </component>

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index a5c3ae1..05e5219 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -11,6 +11,7 @@
             <option value="$PROJECT_DIR$" />
           </set>
         </option>
+        <option name="useAutoImport" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
deleted file mode 100644
index 6664153..0000000
--- a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<component name="libraryTable">
-  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/90d1cf475430763bb8dbdd98d59db85532c63fbc/kotlin-stdlib-js-1.1.0-beta-38-sources.jar!/" />
-    </SOURCES>
-  </library>
-</component>
\ No newline at end of file

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index a5c3ae1..05e5219 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -11,6 +11,7 @@
             <option value="$PROJECT_DIR$" />
           </set>
         </option>
+        <option name="useAutoImport" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
deleted file mode 100644
index 6664153..0000000
--- a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<component name="libraryTable">
-  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/90d1cf475430763bb8dbdd98d59db85532c63fbc/kotlin-stdlib-js-1.1.0-beta-38-sources.jar!/" />
-    </SOURCES>
-  </library>
-</component>
\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
new file mode 100644
index 0000000..723f9fd
--- /dev/null
+++ b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
@@ -0,0 +1,11 @@
+<component name="libraryTable">
+  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1">
+    <CLASSES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/260a9dc3039aee5efea1d57a6a8ee1707361ed5/kotlin-stdlib-js-1.1.1.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/2ad00bdfade81168ba4b90b6a892545a5267bf85/kotlin-stdlib-js-1.1.1-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index a5c3ae1..05e5219 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -11,6 +11,7 @@
             <option value="$PROJECT_DIR$" />
           </set>
         </option>
+        <option name="useAutoImport" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
deleted file mode 100644
index 6664153..0000000
--- a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<component name="libraryTable">
-  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/90d1cf475430763bb8dbdd98d59db85532c63fbc/kotlin-stdlib-js-1.1.0-beta-38-sources.jar!/" />
-    </SOURCES>
-  </library>
-</component>
\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
new file mode 100644
index 0000000..723f9fd
--- /dev/null
+++ b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
@@ -0,0 +1,11 @@
+<component name="libraryTable">
+  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1">
+    <CLASSES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/260a9dc3039aee5efea1d57a6a8ee1707361ed5/kotlin-stdlib-js-1.1.1.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/2ad00bdfade81168ba4b90b6a892545a5267bf85/kotlin-stdlib-js-1.1.1-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/modules/kudens_main.iml b/.idea/modules/kudens_main.iml
index 4be1719..673f217 100644
--- a/.idea/modules/kudens_main.iml
+++ b/.idea/modules/kudens_main.iml
@@ -7,7 +7,7 @@
           <KotlinCompilerInfo>
             <option name="compilerSettings">
               <CompilerSettings>
-                <option name="additionalArguments" value="$MODULE_DIR$/../../build/kotlinjs/kudens.js /home/rnentjes/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar: v5 plain call" />
+                <option name="additionalArguments" value="-verbose" />
               </CompilerSettings>
             </option>
             <option name="k2jsCompilerArguments">
@@ -22,7 +22,7 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
+                <option name="coroutinesWarn" value="true" />
               </K2JSCompilerArguments>
             </option>
             <option name="k2jvmCompilerArguments">
@@ -33,22 +33,13 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
                 <option name="pluginClasspaths">
                   <array />
                 </option>
+                <option name="coroutinesWarn" value="true" />
                 <option name="pluginOptions">
                   <array />
                 </option>
-                <option name="freeArgs">
-                  <list>
-                    <option value="$MODULE_DIR$/../../build/kotlinjs/kudens.js" />
-                    <option value="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar:" />
-                    <option value="v5" />
-                    <option value="plain" />
-                    <option value="call" />
-                  </list>
-                </option>
               </DummyImpl>
             </option>
           </KotlinCompilerInfo>
@@ -64,8 +55,8 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
-    <output url="file://$MODULE_DIR$/../../build/classes/main" />
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/../../build/kotlinjs" />
     <exclude-output />
     <content url="file://$MODULE_DIR$/../../src/main">
       <sourceFolder url="file://$MODULE_DIR$/../../src/main/java" isTestSource="false" />
@@ -74,6 +65,6 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38" level="project" />
+    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1" level="project" />
   </component>
 </module>
\ No newline at end of file

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index a5c3ae1..05e5219 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -11,6 +11,7 @@
             <option value="$PROJECT_DIR$" />
           </set>
         </option>
+        <option name="useAutoImport" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
deleted file mode 100644
index 6664153..0000000
--- a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<component name="libraryTable">
-  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/90d1cf475430763bb8dbdd98d59db85532c63fbc/kotlin-stdlib-js-1.1.0-beta-38-sources.jar!/" />
-    </SOURCES>
-  </library>
-</component>
\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
new file mode 100644
index 0000000..723f9fd
--- /dev/null
+++ b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
@@ -0,0 +1,11 @@
+<component name="libraryTable">
+  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1">
+    <CLASSES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/260a9dc3039aee5efea1d57a6a8ee1707361ed5/kotlin-stdlib-js-1.1.1.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/2ad00bdfade81168ba4b90b6a892545a5267bf85/kotlin-stdlib-js-1.1.1-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/modules/kudens_main.iml b/.idea/modules/kudens_main.iml
index 4be1719..673f217 100644
--- a/.idea/modules/kudens_main.iml
+++ b/.idea/modules/kudens_main.iml
@@ -7,7 +7,7 @@
           <KotlinCompilerInfo>
             <option name="compilerSettings">
               <CompilerSettings>
-                <option name="additionalArguments" value="$MODULE_DIR$/../../build/kotlinjs/kudens.js /home/rnentjes/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar: v5 plain call" />
+                <option name="additionalArguments" value="-verbose" />
               </CompilerSettings>
             </option>
             <option name="k2jsCompilerArguments">
@@ -22,7 +22,7 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
+                <option name="coroutinesWarn" value="true" />
               </K2JSCompilerArguments>
             </option>
             <option name="k2jvmCompilerArguments">
@@ -33,22 +33,13 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
                 <option name="pluginClasspaths">
                   <array />
                 </option>
+                <option name="coroutinesWarn" value="true" />
                 <option name="pluginOptions">
                   <array />
                 </option>
-                <option name="freeArgs">
-                  <list>
-                    <option value="$MODULE_DIR$/../../build/kotlinjs/kudens.js" />
-                    <option value="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar:" />
-                    <option value="v5" />
-                    <option value="plain" />
-                    <option value="call" />
-                  </list>
-                </option>
               </DummyImpl>
             </option>
           </KotlinCompilerInfo>
@@ -64,8 +55,8 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
-    <output url="file://$MODULE_DIR$/../../build/classes/main" />
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/../../build/kotlinjs" />
     <exclude-output />
     <content url="file://$MODULE_DIR$/../../src/main">
       <sourceFolder url="file://$MODULE_DIR$/../../src/main/java" isTestSource="false" />
@@ -74,6 +65,6 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38" level="project" />
+    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/.idea/modules/kudens_test.iml b/.idea/modules/kudens_test.iml
index bd2968e..1916bad 100644
--- a/.idea/modules/kudens_test.iml
+++ b/.idea/modules/kudens_test.iml
@@ -7,7 +7,7 @@
           <KotlinCompilerInfo>
             <option name="compilerSettings">
               <CompilerSettings>
-                <option name="additionalArguments" value="$MODULE_DIR$/../../build/kotlinjs/kudens.js /home/rnentjes/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar: v5 plain call" />
+                <option name="additionalArguments" value="-verbose" />
               </CompilerSettings>
             </option>
             <option name="k2jsCompilerArguments">
@@ -22,7 +22,7 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
+                <option name="coroutinesWarn" value="true" />
               </K2JSCompilerArguments>
             </option>
             <option name="k2jvmCompilerArguments">
@@ -33,22 +33,13 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
                 <option name="pluginClasspaths">
                   <array />
                 </option>
+                <option name="coroutinesWarn" value="true" />
                 <option name="pluginOptions">
                   <array />
                 </option>
-                <option name="freeArgs">
-                  <list>
-                    <option value="$MODULE_DIR$/../../build/kotlinjs/kudens.js" />
-                    <option value="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar:" />
-                    <option value="v5" />
-                    <option value="plain" />
-                    <option value="call" />
-                  </list>
-                </option>
               </DummyImpl>
             </option>
           </KotlinCompilerInfo>
@@ -64,7 +55,7 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
     <output-test url="file://$MODULE_DIR$/../../build/classes/test" />
     <exclude-output />
     <content url="file://$MODULE_DIR$/../../src/test">
@@ -75,7 +66,7 @@
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="module" module-name="kudens_main" />
-    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38" level="project" />
+    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1" level="project" />
   </component>
   <component name="TestModuleProperties" production-module="kudens_main" />
 </module>
\ No newline at end of file

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index a5c3ae1..05e5219 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -11,6 +11,7 @@
             <option value="$PROJECT_DIR$" />
           </set>
         </option>
+        <option name="useAutoImport" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
deleted file mode 100644
index 6664153..0000000
--- a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<component name="libraryTable">
-  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/90d1cf475430763bb8dbdd98d59db85532c63fbc/kotlin-stdlib-js-1.1.0-beta-38-sources.jar!/" />
-    </SOURCES>
-  </library>
-</component>
\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
new file mode 100644
index 0000000..723f9fd
--- /dev/null
+++ b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
@@ -0,0 +1,11 @@
+<component name="libraryTable">
+  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1">
+    <CLASSES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/260a9dc3039aee5efea1d57a6a8ee1707361ed5/kotlin-stdlib-js-1.1.1.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/2ad00bdfade81168ba4b90b6a892545a5267bf85/kotlin-stdlib-js-1.1.1-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/modules/kudens_main.iml b/.idea/modules/kudens_main.iml
index 4be1719..673f217 100644
--- a/.idea/modules/kudens_main.iml
+++ b/.idea/modules/kudens_main.iml
@@ -7,7 +7,7 @@
           <KotlinCompilerInfo>
             <option name="compilerSettings">
               <CompilerSettings>
-                <option name="additionalArguments" value="$MODULE_DIR$/../../build/kotlinjs/kudens.js /home/rnentjes/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar: v5 plain call" />
+                <option name="additionalArguments" value="-verbose" />
               </CompilerSettings>
             </option>
             <option name="k2jsCompilerArguments">
@@ -22,7 +22,7 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
+                <option name="coroutinesWarn" value="true" />
               </K2JSCompilerArguments>
             </option>
             <option name="k2jvmCompilerArguments">
@@ -33,22 +33,13 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
                 <option name="pluginClasspaths">
                   <array />
                 </option>
+                <option name="coroutinesWarn" value="true" />
                 <option name="pluginOptions">
                   <array />
                 </option>
-                <option name="freeArgs">
-                  <list>
-                    <option value="$MODULE_DIR$/../../build/kotlinjs/kudens.js" />
-                    <option value="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar:" />
-                    <option value="v5" />
-                    <option value="plain" />
-                    <option value="call" />
-                  </list>
-                </option>
               </DummyImpl>
             </option>
           </KotlinCompilerInfo>
@@ -64,8 +55,8 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
-    <output url="file://$MODULE_DIR$/../../build/classes/main" />
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/../../build/kotlinjs" />
     <exclude-output />
     <content url="file://$MODULE_DIR$/../../src/main">
       <sourceFolder url="file://$MODULE_DIR$/../../src/main/java" isTestSource="false" />
@@ -74,6 +65,6 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38" level="project" />
+    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/.idea/modules/kudens_test.iml b/.idea/modules/kudens_test.iml
index bd2968e..1916bad 100644
--- a/.idea/modules/kudens_test.iml
+++ b/.idea/modules/kudens_test.iml
@@ -7,7 +7,7 @@
           <KotlinCompilerInfo>
             <option name="compilerSettings">
               <CompilerSettings>
-                <option name="additionalArguments" value="$MODULE_DIR$/../../build/kotlinjs/kudens.js /home/rnentjes/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar: v5 plain call" />
+                <option name="additionalArguments" value="-verbose" />
               </CompilerSettings>
             </option>
             <option name="k2jsCompilerArguments">
@@ -22,7 +22,7 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
+                <option name="coroutinesWarn" value="true" />
               </K2JSCompilerArguments>
             </option>
             <option name="k2jvmCompilerArguments">
@@ -33,22 +33,13 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
                 <option name="pluginClasspaths">
                   <array />
                 </option>
+                <option name="coroutinesWarn" value="true" />
                 <option name="pluginOptions">
                   <array />
                 </option>
-                <option name="freeArgs">
-                  <list>
-                    <option value="$MODULE_DIR$/../../build/kotlinjs/kudens.js" />
-                    <option value="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar:" />
-                    <option value="v5" />
-                    <option value="plain" />
-                    <option value="call" />
-                  </list>
-                </option>
               </DummyImpl>
             </option>
           </KotlinCompilerInfo>
@@ -64,7 +55,7 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
     <output-test url="file://$MODULE_DIR$/../../build/classes/test" />
     <exclude-output />
     <content url="file://$MODULE_DIR$/../../src/test">
@@ -75,7 +66,7 @@
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="module" module-name="kudens_main" />
-    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38" level="project" />
+    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1" level="project" />
   </component>
   <component name="TestModuleProperties" production-module="kudens_main" />
 </module>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index e2af200..22bd472 100644
--- a/build.gradle
+++ b/build.gradle
@@ -20,7 +20,7 @@
 }
 
 buildscript {
-    ext.kotlin_version = '1.1.0-rc-91'
+    ext.kotlin_version = '1.1.1'
     repositories {
         maven {
             url "http://nexus.astraeus.nl/nexus/content/groups/public"

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index a5c3ae1..05e5219 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -11,6 +11,7 @@
             <option value="$PROJECT_DIR$" />
           </set>
         </option>
+        <option name="useAutoImport" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
deleted file mode 100644
index 6664153..0000000
--- a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<component name="libraryTable">
-  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/90d1cf475430763bb8dbdd98d59db85532c63fbc/kotlin-stdlib-js-1.1.0-beta-38-sources.jar!/" />
-    </SOURCES>
-  </library>
-</component>
\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
new file mode 100644
index 0000000..723f9fd
--- /dev/null
+++ b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
@@ -0,0 +1,11 @@
+<component name="libraryTable">
+  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1">
+    <CLASSES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/260a9dc3039aee5efea1d57a6a8ee1707361ed5/kotlin-stdlib-js-1.1.1.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/2ad00bdfade81168ba4b90b6a892545a5267bf85/kotlin-stdlib-js-1.1.1-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/modules/kudens_main.iml b/.idea/modules/kudens_main.iml
index 4be1719..673f217 100644
--- a/.idea/modules/kudens_main.iml
+++ b/.idea/modules/kudens_main.iml
@@ -7,7 +7,7 @@
           <KotlinCompilerInfo>
             <option name="compilerSettings">
               <CompilerSettings>
-                <option name="additionalArguments" value="$MODULE_DIR$/../../build/kotlinjs/kudens.js /home/rnentjes/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar: v5 plain call" />
+                <option name="additionalArguments" value="-verbose" />
               </CompilerSettings>
             </option>
             <option name="k2jsCompilerArguments">
@@ -22,7 +22,7 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
+                <option name="coroutinesWarn" value="true" />
               </K2JSCompilerArguments>
             </option>
             <option name="k2jvmCompilerArguments">
@@ -33,22 +33,13 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
                 <option name="pluginClasspaths">
                   <array />
                 </option>
+                <option name="coroutinesWarn" value="true" />
                 <option name="pluginOptions">
                   <array />
                 </option>
-                <option name="freeArgs">
-                  <list>
-                    <option value="$MODULE_DIR$/../../build/kotlinjs/kudens.js" />
-                    <option value="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar:" />
-                    <option value="v5" />
-                    <option value="plain" />
-                    <option value="call" />
-                  </list>
-                </option>
               </DummyImpl>
             </option>
           </KotlinCompilerInfo>
@@ -64,8 +55,8 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
-    <output url="file://$MODULE_DIR$/../../build/classes/main" />
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/../../build/kotlinjs" />
     <exclude-output />
     <content url="file://$MODULE_DIR$/../../src/main">
       <sourceFolder url="file://$MODULE_DIR$/../../src/main/java" isTestSource="false" />
@@ -74,6 +65,6 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38" level="project" />
+    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/.idea/modules/kudens_test.iml b/.idea/modules/kudens_test.iml
index bd2968e..1916bad 100644
--- a/.idea/modules/kudens_test.iml
+++ b/.idea/modules/kudens_test.iml
@@ -7,7 +7,7 @@
           <KotlinCompilerInfo>
             <option name="compilerSettings">
               <CompilerSettings>
-                <option name="additionalArguments" value="$MODULE_DIR$/../../build/kotlinjs/kudens.js /home/rnentjes/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar: v5 plain call" />
+                <option name="additionalArguments" value="-verbose" />
               </CompilerSettings>
             </option>
             <option name="k2jsCompilerArguments">
@@ -22,7 +22,7 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
+                <option name="coroutinesWarn" value="true" />
               </K2JSCompilerArguments>
             </option>
             <option name="k2jvmCompilerArguments">
@@ -33,22 +33,13 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
                 <option name="pluginClasspaths">
                   <array />
                 </option>
+                <option name="coroutinesWarn" value="true" />
                 <option name="pluginOptions">
                   <array />
                 </option>
-                <option name="freeArgs">
-                  <list>
-                    <option value="$MODULE_DIR$/../../build/kotlinjs/kudens.js" />
-                    <option value="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar:" />
-                    <option value="v5" />
-                    <option value="plain" />
-                    <option value="call" />
-                  </list>
-                </option>
               </DummyImpl>
             </option>
           </KotlinCompilerInfo>
@@ -64,7 +55,7 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
     <output-test url="file://$MODULE_DIR$/../../build/classes/test" />
     <exclude-output />
     <content url="file://$MODULE_DIR$/../../src/test">
@@ -75,7 +66,7 @@
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="module" module-name="kudens_main" />
-    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38" level="project" />
+    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1" level="project" />
   </component>
   <component name="TestModuleProperties" production-module="kudens_main" />
 </module>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index e2af200..22bd472 100644
--- a/build.gradle
+++ b/build.gradle
@@ -20,7 +20,7 @@
 }
 
 buildscript {
-    ext.kotlin_version = '1.1.0-rc-91'
+    ext.kotlin_version = '1.1.1'
     repositories {
         maven {
             url "http://nexus.astraeus.nl/nexus/content/groups/public"
diff --git a/src/main/kotlin/com/persesgames/input/Keys.kt b/src/main/kotlin/com/persesgames/input/Keys.kt
index 652f32d..7a6911d 100644
--- a/src/main/kotlin/com/persesgames/input/Keys.kt
+++ b/src/main/kotlin/com/persesgames/input/Keys.kt
@@ -5,7 +5,6 @@
 import org.w3c.dom.events.KeyboardEvent
 import org.w3c.dom.events.MouseEvent
 import kotlin.browser.document
-import kotlin.dom.on
 import kotlin.js.Date
 
 /**

diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index a5c3ae1..05e5219 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -11,6 +11,7 @@
             <option value="$PROJECT_DIR$" />
           </set>
         </option>
+        <option name="useAutoImport" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
deleted file mode 100644
index 6664153..0000000
--- a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_0_beta_38.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<component name="libraryTable">
-  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38">
-    <CLASSES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES>
-      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/90d1cf475430763bb8dbdd98d59db85532c63fbc/kotlin-stdlib-js-1.1.0-beta-38-sources.jar!/" />
-    </SOURCES>
-  </library>
-</component>
\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
new file mode 100644
index 0000000..723f9fd
--- /dev/null
+++ b/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_js_1_1_1.xml
@@ -0,0 +1,11 @@
+<component name="libraryTable">
+  <library name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1">
+    <CLASSES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/260a9dc3039aee5efea1d57a6a8ee1707361ed5/kotlin-stdlib-js-1.1.1.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.1/2ad00bdfade81168ba4b90b6a892545a5267bf85/kotlin-stdlib-js-1.1.1-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/modules/kudens_main.iml b/.idea/modules/kudens_main.iml
index 4be1719..673f217 100644
--- a/.idea/modules/kudens_main.iml
+++ b/.idea/modules/kudens_main.iml
@@ -7,7 +7,7 @@
           <KotlinCompilerInfo>
             <option name="compilerSettings">
               <CompilerSettings>
-                <option name="additionalArguments" value="$MODULE_DIR$/../../build/kotlinjs/kudens.js /home/rnentjes/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar: v5 plain call" />
+                <option name="additionalArguments" value="-verbose" />
               </CompilerSettings>
             </option>
             <option name="k2jsCompilerArguments">
@@ -22,7 +22,7 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
+                <option name="coroutinesWarn" value="true" />
               </K2JSCompilerArguments>
             </option>
             <option name="k2jvmCompilerArguments">
@@ -33,22 +33,13 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
                 <option name="pluginClasspaths">
                   <array />
                 </option>
+                <option name="coroutinesWarn" value="true" />
                 <option name="pluginOptions">
                   <array />
                 </option>
-                <option name="freeArgs">
-                  <list>
-                    <option value="$MODULE_DIR$/../../build/kotlinjs/kudens.js" />
-                    <option value="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar:" />
-                    <option value="v5" />
-                    <option value="plain" />
-                    <option value="call" />
-                  </list>
-                </option>
               </DummyImpl>
             </option>
           </KotlinCompilerInfo>
@@ -64,8 +55,8 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
-    <output url="file://$MODULE_DIR$/../../build/classes/main" />
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/../../build/kotlinjs" />
     <exclude-output />
     <content url="file://$MODULE_DIR$/../../src/main">
       <sourceFolder url="file://$MODULE_DIR$/../../src/main/java" isTestSource="false" />
@@ -74,6 +65,6 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38" level="project" />
+    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/.idea/modules/kudens_test.iml b/.idea/modules/kudens_test.iml
index bd2968e..1916bad 100644
--- a/.idea/modules/kudens_test.iml
+++ b/.idea/modules/kudens_test.iml
@@ -7,7 +7,7 @@
           <KotlinCompilerInfo>
             <option name="compilerSettings">
               <CompilerSettings>
-                <option name="additionalArguments" value="$MODULE_DIR$/../../build/kotlinjs/kudens.js /home/rnentjes/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar: v5 plain call" />
+                <option name="additionalArguments" value="-verbose" />
               </CompilerSettings>
             </option>
             <option name="k2jsCompilerArguments">
@@ -22,7 +22,7 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
+                <option name="coroutinesWarn" value="true" />
               </K2JSCompilerArguments>
             </option>
             <option name="k2jvmCompilerArguments">
@@ -33,22 +33,13 @@
                 <option name="languageVersion" value="1.1" />
                 <option name="apiVersion" value="1.1" />
                 <option name="suppressWarnings" value="true" />
-                <option name="verbose" value="true" />
                 <option name="pluginClasspaths">
                   <array />
                 </option>
+                <option name="coroutinesWarn" value="true" />
                 <option name="pluginOptions">
                   <array />
                 </option>
-                <option name="freeArgs">
-                  <list>
-                    <option value="$MODULE_DIR$/../../build/kotlinjs/kudens.js" />
-                    <option value="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.0-beta-38/dea46fa0ee81d4e90f45867a7dc81557979479f3/kotlin-stdlib-js-1.1.0-beta-38.jar:" />
-                    <option value="v5" />
-                    <option value="plain" />
-                    <option value="call" />
-                  </list>
-                </option>
               </DummyImpl>
             </option>
           </KotlinCompilerInfo>
@@ -64,7 +55,7 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
     <output-test url="file://$MODULE_DIR$/../../build/classes/test" />
     <exclude-output />
     <content url="file://$MODULE_DIR$/../../src/test">
@@ -75,7 +66,7 @@
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="module" module-name="kudens_main" />
-    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.0-beta-38" level="project" />
+    <orderEntry type="library" name="Gradle: org.jetbrains.kotlin:kotlin-stdlib-js:1.1.1" level="project" />
   </component>
   <component name="TestModuleProperties" production-module="kudens_main" />
 </module>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index e2af200..22bd472 100644
--- a/build.gradle
+++ b/build.gradle
@@ -20,7 +20,7 @@
 }
 
 buildscript {
-    ext.kotlin_version = '1.1.0-rc-91'
+    ext.kotlin_version = '1.1.1'
     repositories {
         maven {
             url "http://nexus.astraeus.nl/nexus/content/groups/public"
diff --git a/src/main/kotlin/com/persesgames/input/Keys.kt b/src/main/kotlin/com/persesgames/input/Keys.kt
index 652f32d..7a6911d 100644
--- a/src/main/kotlin/com/persesgames/input/Keys.kt
+++ b/src/main/kotlin/com/persesgames/input/Keys.kt
@@ -5,7 +5,6 @@
 import org.w3c.dom.events.KeyboardEvent
 import org.w3c.dom.events.MouseEvent
 import kotlin.browser.document
-import kotlin.dom.on
 import kotlin.js.Date
 
 /**
diff --git a/src/main/kotlin/com/persesgames/sound/Music.kt b/src/main/kotlin/com/persesgames/sound/Music.kt
index 432bc6c..72c6f4d 100644
--- a/src/main/kotlin/com/persesgames/sound/Music.kt
+++ b/src/main/kotlin/com/persesgames/sound/Music.kt
@@ -2,7 +2,6 @@
 
 import org.w3c.dom.HTMLAudioElement
 import kotlin.browser.document
-import kotlin.dom.on
 
 /**
  * User: rnentjes