Really nice idea for a game. It was actually more difficult than I expected to coordinate my mouse hovering with aiming the lil' ball guy! I really liked the music as well, though it didn't quite loop perfectly. The simple art style was nice too - it reminded me of the original Gameboy! :)
One suggestion I had was that the winged power up be changed in some way. I actually found it more annoying to constantly have the ball off screen due to it travelling higher... perhaps instead it could have given you greater control over the balls left and right movements instead?
Really enjoyed the concept though!