public void checkCollision() {
        paddle = (Paddle) getOneIntersectingObject(Paddle.class);
        if(paddle != null) {
            // if hits paddle, enlarge the paddle
            paddle.enlarge();
            // stop falling
            move = false;
            // remove powerup from world
            getWorld().removeObject(this);
        }
        if(move ) {
            // fall down if didn't touch paddle
            fall();
        }
    }