Not Bad.
Although I agree that there should probably be some music, I think what sets this game aside from others is the fact that it's not filled with sensless, uneeded bullshit.
It doesn't need so amazing looking background, it doesn't need hoards of enemies and blooshed.
It just needs a challange.
This game had its difficult points, but I think what would have made the game close to perfect is a time limit.
If you give someone as much time as they want, the game gets too easy.
Give them a time limit, and it makes it much more difficult.
Plus you can make an easy mode, normal mode, and a hard mode by changing the amount of time given.
Overall, I don't think this is anything too amazing, however it does disearve credit. It's plain, simple, but fun.
I would suggest if it doesn't make it through, maybe fix the graphics and add a timer.
Great work.
~Tovi~