Fixed an error that stopped 2 tweens from being able to run on the same object. Also refactored a lot of the classes to remove prototype properties and move them to local instance properties.

src/loader/Cache.js

@@ -11,10 +11,34 @@
 */
 Phaser.Cache = function (game) {
 
+    /**
+     * Local reference to Game.
+     */
 	this.game = game;
+
+    /**
+     * Canvas key-value container.
+     * @type {object}
+     * @private
+     */
     this._canvases = {};
+
+    /**
+     * Image key-value container.
+     * @type {object}
+     */
     this._images = {};
+
+    /**
+     * Sound key-value container.
+     * @type {object}
+     */
     this._sounds = {};
+
+    /**
+     * Text key-value container.
+     * @type {object}
+     */
     this._text = {};
 
     this.addDefaultImage();
@@ -23,36 +47,6 @@ Phaser.Cache = function (game) {
 
 Phaser.Cache.prototype = {
 
-    /**
-     * Local reference to Game.
-     */
-    game: null,
-
-    /**
-     * Canvas key-value container.
-     * @type {object}
-     * @private
-     */
-    _canvases: {},
-
-    /**
-     * Image key-value container.
-     * @type {object}
-     */
-    _images: {},
-
-    /**
-     * Sound key-value container.
-     * @type {object}
-     */
-    _sounds: {},
-
-    /**
-     * Text key-value container.
-     * @type {object}
-     */
-    _text: {},
-
     /**
      * Add a new canvas.
      * @param key {string} Asset key for this canvas.