public void keyReleased(KeyEvent e){
		switch(e.getKeyCode()){
			case 37:
			case 65:
			left = false;
			break;
			case 38:
			case 87:
			up = false;
			break;
			case 39:
			case 68:
			right = false;
			break;
			case 40:
			case 83:
			down = false;
			break;
		}
	}