flawless
well, mostly.
I found that the buttons are annoyingly small, but this is probably an invaluable tutorial for any maker of games.
It would also be a cool game if you could play around with gravity and throw in some wind factors as well, trying to get a ball to a goal. My gr. 12 physics teacher told us that air resistance physics were too compelx for high school, no matter how interested I was in it. I'd like to see some of that in a game if anyone has the ability.