public void updateWorld() {
		int offset = player.x - gameFrame.WIDTH/2 - floor.x;
		floor.setLocation(player.x - gameFrame.WIDTH/2, gameFrame.HEIGHT - FLOOR_HEIGHT);
		for(int i=0; i < star.length; i++) {
			star[i].setLocation((int)(star[i].getX() + offset), (int)star[i].getY());
		}
	}