unify scene left method

src/js/scenes/engine/phaser/credits.js

@@ -1,23 +1,24 @@
 var Credit = function (game) {
     this.background = null;
     this.text = null;
-    this.keys = {};
 };
 Credit.prototype = {
     create: function () {
         this.background = this.add.sprite(this.game.world.centerX, this.game.world.centerY, 'credits');
         this.background.anchor.setTo(0.5, 0.5);
         this.background.width = this.game.world.width;
         this.background.height = this.game.world.height;
-
-        this.game.input.keyboard.addKeyCapture([Phaser.Keyboard.ESC]);
-        this.keys.esc = this.game.input.keyboard.addKey(Phaser.Keyboard.ESC);
     },
     update: function () {
-        if (this.keys.esc.isDown || this.game.input.activePointer.isDown) {
-            this.game.state.clearCurrentState();
+        var that = this;
+        if(this.game.input.activePointer.isDown) {
             this.game.state.start('Menu');
-            return true;
         }
+        this.game.input.keyboard.onPressCallback = function () {
+            that.game.state.start('Menu');
+        }
+    },
+    shutdown: function () {
+        this.game.input.keyboard.onPressCallback = null;
     }
 };

src/js/scenes/engine/phaser/intro.js

@@ -6,7 +6,6 @@ Intro.prototype = {
     create: function () {
         this.video = null;
         this.video = this.game.add.video('intro');
-        var oHeight = this.video.height;
         this.video.addToWorld(this.game.world.centerX, this.game.world.centerY, 0.5, 0.5, this.game.world.height/this.video.height, this.game.world.height/this.video.height);
         this.video.onComplete.addOnce(this.videoEnd, this);
         this.video.play();