anchor.diff:              ship.movingDown = true;
               break;
         }
  -        
  +
  +      //shooting bullet
  +      if(value.keyCode == spacebar){
  +	      bullet.x = ship.x;
  +	      bullet.y = ship.y - ship.height;
  +
  +	      stage.addChild(bullet);
  +	      stage.juggler.add(bullet);
  +	    }
  +
       });
   
       //Event listener for cursor keyUP events
  
positive.code: RenderLoop renderLoop;
  ResourceManager resourceManager;
  Juggler juggler;
  Tween tween;
  
  void main() {
    // setup the Stage and RenderLoop
  
negative.code:     //so we can use it for keyboard events
      stage.focus = stage;
      
      //spacebar
      const spacebar = 32;
  
      //cursor keys
      const leftArrow = 37;
      const upArrow = 38;
      const rightArrow = 39;
      const downArrow = 40;
  
      //Event handling for cursor KeyDown events
      // value is a Keyboard event
      stage.onKeyDown.listen((value){
        //print(value.keyCode);
  