code: public Sprite getSpriteAt(int x, int y) {
  		for (int i=0;i<sprites.size();i++) {
  			if (((Sprite) sprites.get(i)).contains(x,y)) {
  				return ((Sprite) sprites.get(i));
  			}
  		}
  		
  		return null;
  	}
docs: Get the sprite a given location on the current sheet
  
  @param x The x coordinate to look for the sprite
  @param y The y coordinate to look for the sprite
  @return The sprite found at the given location or null if no sprite can be found