При создании экземпляра Scene используется объект App

examples/simple_scene/game.js

@@ -14,7 +14,7 @@ player.obj.ticker = () => {
   player.obj.x = player.x;
 };
 
-let firstScene = new ujs.Scene(app.canvas, app.context, 400, 400);
+let firstScene = new ujs.Scene(app, 400, 400);
 let layerInstances = new ujs.SceneLayer('Instances', [player.obj]);
 firstScene.addLayer(layerInstances);
 app.scene = firstScene;

src/main.js

@@ -30,7 +30,7 @@ export class App {
       this.options.welcome = true;
     }
 
-    this.scene = new Scene(this.canvas, this.context, width, height);
+    this.scene = new Scene(this, width, height);
 
     const logStrings = [
       'ujs engine',

src/scene.js

@@ -5,9 +5,9 @@ export class Scene {
   #context;
   #layers;
 
-  constructor(canvas, context, width, height) {
-    this.#canvas = canvas;
-    this.#context = context;
+  constructor(app, width, height) {
+    this.#canvas = app.canvas;
+    this.#context = app.context;
     this.#layers = Array();
 
     this.setScreenSize(width, height);