code: function() {
  
          // background color
          me.game.world.addChild(new me.ColorLayer("background", "#330000"), 0);
  
          // static background image
          var background = new me.Sprite(480, 320, {
              image: game.texture,
              region : "backdrop.png"
          });
          me.game.world.addChild(background, 1);
  
          // character animation
          var animationSheet = game.texture.createAnimationFromName([
              "slice04_04.png", "slice05_05.png", "slice12_12.png", "slice13_13.png"
          ]);
          animationSheet.pos.set(200, 200, 2);
          me.game.world.addChild(animationSheet, 2);
      }
docs: action to perform on state change