not so good
I started this game and could have swore I just played it earlier today with different graphics and sure enough I did. "Trickochet" on addictinggames.com is just like this game except with different graphics and minor other differences. Well I doubt you copied it (I give you the benefit of the doubt) and what game is original these days anyway. So just an observation, lets move on with the review.
But the game then, it does get bit boring as there isn't much change. It's a simple game after all. One thing though in this game what put me totally off was the collision detection. You can easily see how faulty it is at level 4. Just shoot in a low upward angle and watch how the ball bounces downwards instead of upwards. In a game where the bounces are everything, you can't have so easily faulty bounces, it kills the whole game.