Needs some in-game instructions. Enemies that contrast with the background would be nice. The music doesn't really fit, you could easily find a better song (that's not used in another game). And the biggest glitch, while it asks you to submit your score, it keeps going up. So you could get ridiculous scores just by waiting.
I actually like this game. It's got pretty good graphics, and it could have good gameplay, but it needs a bit of improvement. Biggest, and easiest thing I can think of is adding a few levels of difficulty. The one-hit-death gets annoying after a while. If you added a few powerups, like temporary invincibility, that would work too.
Good concept, could have been a lot better. You should look at an online physics tutorial to get the balls to react better, and redraw the graphics. If you did that, and added more levels of difficulty, t hen it would be a good game!
Pretty fun, but I'd make the bullets more powerful, or the enemies more gradual. There's one or two at first, and then there's suddenly a whole screen of them.
Good graphics, but needs better transitions, and the shop needs a display for how much "money" you have. Also, you need better instructions. Just a line about "Destroy these things with your shots" (and show a picture).