That was f*cking addicting!
But there's one little thing I'd like to say: improve your controls because it's really hard to steer the ball with the keyboard.
It would be too easy if you could use the mouse, but you know there are people out there who have a azerty-keyboard. I have one and it's pretty difficult because the keys to steer the ball with are not next to each other. If you just had used the arrowkeys, it would be more enjoyable for anyone on NG.