diff --git a/.vscode/GDevelopExtensions.code-snippets b/.vscode/GDevelopExtensions.code-snippets
index 20c668d2cd..3f153bd394 100644
--- a/.vscode/GDevelopExtensions.code-snippets
+++ b/.vscode/GDevelopExtensions.code-snippets
@@ -75,7 +75,7 @@
       "\t)",
       "\t.getCodeExtraInformation()",
       "\t.setIncludeFile('Extensions/${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/$2/}/${9:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/${2:/downcase}/}tools}.js')",
-      "\t.setFunctionName('gdjs.${7:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/${2:/downcase}/}.}');",
+      "\t.setFunctionName('gdjs.evtTools.${7:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/${2:/downcase}/}.}');",
       "",
       "$0"
     ]
@@ -97,7 +97,7 @@
       "\t)",
       "\t.getCodeExtraInformation()",
       "\t.setIncludeFile('Extensions/${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/$2/}/${8:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/${2:/downcase}/}tools}.js')",
-      "\t.setFunctionName('gdjs.${6:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/${2:/downcase}/}.}');",
+      "\t.setFunctionName('gdjs.evtTools.${6:${TM_DIRECTORY/(.*)[\\\\\\/](.*)[\\\\\\/]?$/${2:/downcase}/}.}');",
       "",
       "$0"
     ]
diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
index 30832b8342..310f58aa12 100644
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -1,104 +1,98 @@
 {
-    "configurations": [
-        {
-            "name": "Mac",
-            "includePath": [
-                "${workspaceRoot}",
-                "${workspaceRoot}/GDCpp",
-                "${workspaceRoot}/GDJS",
-                "${workspaceRoot}/Extensions",
-                "${workspaceRoot}/Core",
-                "${workspaceRoot}/ExtLibs/SFML/include",
-                "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1",
-                "/usr/local/include",
-                "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include",
-                "/usr/include",
-                "${workspaceRoot}"
-            ],
-            "defines": [
-                "GD_IDE_ONLY",
-                "GD_CORE_API=/* Macro used to export classes on Windows, please ignore */",
-                "GD_API=/* Macro used to export classes on Windows, please ignore */",
-                "GD_EXTENSION_API=/* Macro used to export classes on Windows, please ignore */"
-            ],
-            "intelliSenseMode": "clang-x64",
-            "browse": {
-                "path": [
-                    "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1",
-                    "/usr/local/include",
-                    "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include",
-                    "/usr/include",
-                    "${workspaceRoot}"
-                ],
-                "limitSymbolsToIncludedHeaders": true,
-                "databaseFilename": ""
-            },
-            "macFrameworkPath": [
-                "/System/Library/Frameworks",
-                "/Library/Frameworks"
-            ],
-            "compilerPath": "/usr/bin/clang",
-            "cStandard": "c11",
-            "cppStandard": "c++17"
-        },
-        {
-            "name": "Linux",
-            "includePath": [
-                "${workspaceRoot}",
-                "${workspaceRoot}/GDCpp",
-                "${workspaceRoot}/GDJS",
-                "${workspaceRoot}/Extensions",
-                "${workspaceRoot}/Core",
-                "${workspaceRoot}/ExtLibs/SFML/include",
-                "/usr/include",
-                "/usr/local/include",
-                "${workspaceRoot}"
-            ],
-            "defines": [
-                "GD_IDE_ONLY",
-                "GD_CORE_API=/* Macro used to export classes on Windows, please ignore */",
-                "GD_API=/* Macro used to export classes on Windows, please ignore */",
-                "GD_EXTENSION_API=/* Macro used to export classes on Windows, please ignore */"
-            ],
-            "intelliSenseMode": "clang-x64",
-            "browse": {
-                "path": [
-                    "/usr/include",
-                    "/usr/local/include",
-                    "${workspaceRoot}"
-                ],
-                "limitSymbolsToIncludedHeaders": true,
-                "databaseFilename": ""
-            }
-        },
-        {
-            "name": "Win32",
-            "includePath": [
-                "${workspaceRoot}",
-                "${workspaceRoot}/GDCpp",
-                "${workspaceRoot}/GDJS",
-                "${workspaceRoot}/Extensions",
-                "${workspaceRoot}/Core",
-                "${workspaceRoot}/ExtLibs/SFML/include",
-                "${workspaceRoot}"
-            ],
-            "defines": [
-                "_DEBUG",
-                "UNICODE",
-                "GD_IDE_ONLY",
-                "GD_CORE_API=/* Macro used to export classes on Windows, please ignore */",
-                "GD_API=/* Macro used to export classes on Windows, please ignore */",
-                "GD_EXTENSION_API=/* Macro used to export classes on Windows, please ignore */"
-            ],
-            "intelliSenseMode": "msvc-x64",
-            "browse": {
-                "path": [
-                    "${workspaceRoot}"
-                ],
-                "limitSymbolsToIncludedHeaders": true,
-                "databaseFilename": ""
-            }
-        }
-    ],
-    "version": 4
+  "configurations": [
+    {
+      "name": "Mac",
+      "includePath": [
+        "${workspaceRoot}",
+        "${workspaceRoot}/GDCpp",
+        "${workspaceRoot}/GDJS",
+        "${workspaceRoot}/Extensions",
+        "${workspaceRoot}/Core",
+        "${workspaceRoot}/ExtLibs/SFML/include",
+        "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1",
+        "/usr/local/include",
+        "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include",
+        "/usr/include",
+        "${workspaceRoot}"
+      ],
+      "defines": [
+        "EMSCRIPTEN",
+        "GD_IDE_ONLY",
+        "GD_CORE_API=/* Macro used to export classes on Windows, please ignore */",
+        "GD_API=/* Macro used to export classes on Windows, please ignore */",
+        "GD_EXTENSION_API=/* Macro used to export classes on Windows, please ignore */"
+      ],
+      "intelliSenseMode": "clang-x64",
+      "browse": {
+        "path": [
+          "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1",
+          "/usr/local/include",
+          "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include",
+          "/usr/include",
+          "${workspaceRoot}"
+        ],
+        "limitSymbolsToIncludedHeaders": true,
+        "databaseFilename": ""
+      },
+      "macFrameworkPath": ["/System/Library/Frameworks", "/Library/Frameworks"],
+      "compilerPath": "/usr/bin/clang",
+      "cStandard": "c11",
+      "cppStandard": "c++17"
+    },
+    {
+      "name": "Linux",
+      "includePath": [
+        "${workspaceRoot}",
+        "${workspaceRoot}/GDCpp",
+        "${workspaceRoot}/GDJS",
+        "${workspaceRoot}/Extensions",
+        "${workspaceRoot}/Core",
+        "${workspaceRoot}/ExtLibs/SFML/include",
+        "/usr/include",
+        "/usr/local/include",
+        "${workspaceRoot}"
+      ],
+      "defines": [
+        "EMSCRIPTEN",
+        "GD_IDE_ONLY",
+        "GD_CORE_API=/* Macro used to export classes on Windows, please ignore */",
+        "GD_API=/* Macro used to export classes on Windows, please ignore */",
+        "GD_EXTENSION_API=/* Macro used to export classes on Windows, please ignore */"
+      ],
+      "intelliSenseMode": "clang-x64",
+      "browse": {
+        "path": ["/usr/include", "/usr/local/include", "${workspaceRoot}"],
+        "limitSymbolsToIncludedHeaders": true,
+        "databaseFilename": ""
+      }
+    },
+    {
+      "name": "Win32",
+      "includePath": [
+        "${workspaceRoot}",
+        "${workspaceRoot}/GDCpp",
+        "${workspaceRoot}/GDJS",
+        "${workspaceRoot}/Extensions",
+        "${workspaceRoot}/Core",
+        "${workspaceRoot}/ExtLibs/SFML/include",
+        "${workspaceRoot}"
+      ],
+      "defines": [
+        "_DEBUG",
+        "UNICODE",
+        "EMSCRIPTEN",
+        "GD_IDE_ONLY",
+        "GD_CORE_API=/* Macro used to export classes on Windows, please ignore */",
+        "GD_API=/* Macro used to export classes on Windows, please ignore */",
+        "GD_EXTENSION_API=/* Macro used to export classes on Windows, please ignore */"
+      ],
+      "intelliSenseMode": "msvc-x64",
+      "browse": {
+        "path": ["${workspaceRoot}"],
+        "limitSymbolsToIncludedHeaders": true,
+        "databaseFilename": ""
+      }
+    }
+  ],
+  "version": 4
 }
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
index 319637dff1..0a05538dfa 100644
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -1,8 +1,8 @@
 {
-    "recommendations": [
-        "esbenp.prettier-vscode",
-        "xaver.clang-format",
-        "ms-vscode.cpptools",
-        "flowtype.flow-for-vscode"
-    ]
-}
\ No newline at end of file
+  "recommendations": [
+    "esbenp.prettier-vscode",
+    "xaver.clang-format",
+    "ms-vscode.cpptools",
+    "flowtype.flow-for-vscode"
+  ]
+}
diff --git a/.vscode/launch.json b/.vscode/launch.json
index 562cc64077..a5b91a958e 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -1,15 +1,16 @@
 {
-    // Use IntelliSense to learn about possible attributes.
-    // Hover to view descriptions of existing attributes.
-    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "type": "pwa-chrome",
-            "request": "launch",
-            "name": "Launch Chrome against localhost",
-            "url": "http://localhost:3000",
-            "webRoot": "${workspaceFolder}"
-        }
-    ]
-}
\ No newline at end of file
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "pwa-chrome",
+      "request": "launch",
+      "name": "Launch Chrome against localhost",
+      "url": "http://localhost:3000",
+      "webRoot": "${workspaceFolder}",
+      "preLaunchTask": "Start development server"
+    }
+  ]
+}
diff --git a/.vscode/settings.json b/.vscode/settings.json
index b8b143e2ac..f61b4af0d5 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -114,6 +114,7 @@
         "Binaries/*build*": true,
         "Binaries/Output": true,
         "ExtLibs/SFML": true,
+        "GDJS/Runtime-dist": true,
         "docs": true,
         "newIDE/electron-app/dist": true,
         "newIDE/app/build": true,
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index 0098fbd883..f42a556a92 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -1,66 +1,100 @@
 {
   "version": "2.0.0",
   "tasks": [
-	{
-		"type": "npm",
-		"script": "start",
-		"path": "newIDE/app/",
-		"group": {
-			"kind": "build",
-			"isDefault": true
-		},
-		"problemMatcher": [],
-		"label": "Start development server",
-		"detail": "Starts the GDevelop development server."
-	},
-	{
-		"type": "npm",
-		"script": "build",
-		"path": "GDevelop.js/",
-		"group": "build",
-		"problemMatcher": [],
-		"label": "Build GDevelop.js",
-		"detail": "Builds GDCore for newIDE."
-	},
-	{
-		"type": "npm",
-		"script": "format",
-		"path": "newIDE/app/",
-		"problemMatcher": [],
-		"label": "Format newIDE",
-		"detail": "Run auto-formatting (with Prettier) for the newIDE/app directory."
-	},
-	{
-		"type": "npm",
-		"script": "test",
-		"path": "newIDE/app/",
-		"group": {
-			"kind": "test",
-			"isDefault": true
-		},
-		"problemMatcher": [],
-		"label": "Run newIDE tests",
-		"detail": "Run tests for newIDE."
-	},
-	{
-		"type": "typescript",
-		"tsconfig": "GDJS/tsconfig.json",
-		"option": "watch",
-		"problemMatcher": [
-			"$tsc-watch"
-		],
-		"group": "test",
-		"label": "GDJS TS Check",
-		"detail": "Runs a types check on the GDJS Runtime."
-	},
-	{
-		"type": "npm",
-		"script": "test",
-		"path": "GDJS/",
-		"group": "test",
-		"problemMatcher": [],
-		"label": "Run GDJS tests",
-		"detail": "Run tests for GDJS."
-	}
-]
+    {
+      "type": "npm",
+      "script": "start",
+      "path": "newIDE/app/",
+      "group": "build",
+      "label": "Start development server",
+      "detail": "Starts the GDevelop development server.",
+      "problemMatcher": [
+        {
+          "owner": "cra",
+          "fileLocation": ["relative", "${workspaceFolder}/newIDE/app"],
+          "source": "create-react-app",
+          "applyTo": "allDocuments",
+          "pattern": [
+            {
+              "regexp": "^([^\\s].*?)$",
+              "file": 1
+            },
+            {
+              "regexp": "^  Line\\s+(\\d+):\\s+(.*)\\s\\s+(.*)$",
+              "line": 1,
+              "message": 2,
+              "code": 3,
+              "loop": true
+            }
+          ],
+          "background": {
+            "activeOnStart": true,
+            "beginsPattern": "^(?:Compiled with warnings\\.|Compiled successfully!)$",
+            "endsPattern": "^(?:Search for the keywords to learn more about each warning\\.|Note that the development build is not optimized\\.)$"
+          }
+        }
+      ],
+      "presentation": {
+        "reveal": "silent"
+      },
+      "isBackground": true,
+      "runOptions": { "instanceLimit": 1, "runOn": "folderOpen" }
+    },
+    {
+      "type": "npm",
+      "script": "start",
+      "path": "newIDE/electron-app/",
+      "group": "build",
+      "problemMatcher": [],
+      "label": "Start electron app",
+      "detail": "Starts the development local version of GDevelop."
+    },
+    {
+      "type": "npm",
+      "script": "build",
+      "path": "GDevelop.js/",
+      "group": "build",
+      "problemMatcher": [],
+      "label": "Build GDevelop.js",
+      "detail": "Builds GDCore for newIDE."
+    },
+    {
+      "type": "npm",
+      "script": "format",
+      "path": "newIDE/app/",
+      "problemMatcher": [],
+      "label": "Format newIDE",
+      "detail": "Run auto-formatting (with Prettier) for the newIDE/app directory."
+    },
+    {
+      "type": "npm",
+      "script": "test",
+      "path": "newIDE/app/",
+      "group": {
+        "kind": "test",
+        "isDefault": true
+      },
+      "problemMatcher": [],
+      "label": "Run newIDE tests",
+      "detail": "Run tests for newIDE."
+    },
+    {
+      "type": "typescript",
+      "tsconfig": "GDJS/tsconfig.json",
+      "option": "watch",
+      "problemMatcher": ["$tsc-watch"],
+      "group": "test",
+      "label": "GDJS TS Check",
+      "detail": "Runs a types check on the GDJS Runtime."
+    },
+    {
+      "type": "npm",
+      "script": "test",
+      "path": "GDJS/",
+      "group": "test",
+      "problemMatcher": [],
+      "label": "Run GDJS tests",
+      "detail": "Run tests for GDJS."
+    }
+  ]
 }
diff --git a/newIDE/README.md b/newIDE/README.md
index 28b8932f0b..33ce145f25 100644
--- a/newIDE/README.md
+++ b/newIDE/README.md
@@ -42,15 +42,7 @@ cd newIDE/app && npm start # Be sure to have this running in another terminal, b
 # In a new terminal:
 cd newIDE/electron-app
 npm install # or yarn
-
-#For macOS:
-npm run electron-mac
-
-#For Windows:
-npm run electron-win
-
-#For Linux:
-npm run electron-linux
+npm run start # or yarn start
 ```
 
 ### Quick Install and Run
diff --git a/newIDE/app/package.json b/newIDE/app/package.json
index 5620b7db41..3c7df70516 100644
--- a/newIDE/app/package.json
+++ b/newIDE/app/package.json
@@ -87,9 +87,7 @@
     "make-version-metadata": "cd scripts && node make-version-metadata.js",
     "make-service-worker": "cd scripts && node make-service-worker.js",
     "start": "npm run import-resources && npm run make-version-metadata && react-scripts start",
-    "electron-win": "cd ../electron-app && node node_modules/electron/cli.js app",
-    "electron-linux": "cd ../electron-app && ./node_modules/electron/dist/electron app",
-    "electron-mac": "cd ../electron-app && ./node_modules/electron/dist/Electron.app/Contents/MacOS/Electron app",
+    "electron-app": "cd ../electron-app && npm run start",
     "build": "npm run import-resources && npm run make-version-metadata && react-scripts build && npm run make-service-worker",
     "format": "prettier --write \"src/!(locales)/**/*.js\"",
     "check-format": "prettier --list-different \"src/!(locales)/**/*.js\"",
diff --git a/newIDE/electron-app/package.json b/newIDE/electron-app/package.json
index 4224ca01e0..c444e0067a 100644
--- a/newIDE/electron-app/package.json
+++ b/newIDE/electron-app/package.json
@@ -14,9 +14,7 @@
     "build": "node scripts/build.js",
     "format": "prettier --write --ignore-path .gitignore \"**/*.js\"",
     "check-format": "prettier --list-different --ignore-path .gitignore \"**/*.js\"",
-    "electron-win": "node node_modules/electron/cli.js app",
-    "electron-linux": "./node_modules/electron/dist/electron app",
-    "electron-mac": "./node_modules/electron/dist/Electron.app/Contents/MacOS/Electron app",
+    "start": "electron app",
     "reload-extensions": "cd ../app/scripts && node import-GDJS-Runtime.js",
     "import-zipped-electron-extensions": "node scripts/import-zipped-electron-extension.js ReactDeveloperTools app/extensions/"
   },