code: function() { //when loaded
  
  			Crafty.sprite(960, 640 , "assets/background.jpg", {
                  background: [0,0]
  			});
  
  	    	Crafty.sprite(200, 200 , "assets/portero.png", {
  			    PlayerSprite: [0,0]
  			});
  
  			Crafty.sprite(100, 100 , "assets/ball.png", {
  			    BallSprite: [0,0]
  			});
  
  	        Crafty.scene("menu"); //go to main scene
  	    }
docs: preload assets