Graveyard terrain and background tiles implemented

js/Level.js

@@ -6,10 +6,15 @@ export default class Level
 {
     static FACTOR_GRAVITY = 4.903;
 
+    /**
+     * @param {Terrain} terrain 
+     */
     constructor(terrain)
     {
+        /** @type {Terrain} */
         this.terrain = terrain;
-	this.fullscreenEffects = [];
+
+	    this.fullscreenEffects = [];
         this.gravity = 2.0;
     }
 
@@ -78,7 +83,7 @@ export default class Level
         this.gravity = gravity;
     }
 
-    static createFromFile(filename, callback = () => {})
+    static createFromFile(filename, onLoad = () => {})
     {
         let loader = new FileLoader(filename);
         loader.onLoad = (data) => {
@@ -86,6 +91,12 @@ export default class Level
             const level = new Level(Terrain.createFromJson(json));
             level.setGravity(json.gravity / Level.FACTOR_GRAVITY);
 
+            for (const oldEffect of level.fullscreenEffects) {
+               oldEffect.destroy();
+	        }
+
+            level.fullscreenEffects = [];
+
             if (json.hasOwnProperty('effects')) {
                const effectFactory = new FullscreenEffectFactory();
 
@@ -96,7 +107,7 @@ export default class Level
                }
             }
 
-            callback(level);
+            onLoad(level);
         }
         loader.loadContent();
     }
@@ -109,6 +120,12 @@ export default class Level
         const level = new Level(terrain);
         level.setGravity(data.gravity / Level.FACTOR_GRAVITY);
 
+        for (const oldEffect of level.fullscreenEffects) {
+           oldEffect.destroy();
+	    }
+
+        level.fullscreenEffects = [];
+
 	if (data.hasOwnProperty('effects')) {
 		const effectFactory = new FullscreenEffectFactory();