Not bad.
Animation / Graphics - Very smooth animation, even though at first I thought that the controls were just a bit touchy. After playing for a little though it got easy to control. The graphics were very simple, but in my opinion that is exactly what was needed in this type of game.
Story - Not a type of game. You had a lot of good obsticles that could get in your way which added to the fun of the game. The only thing that I could think about to help this section out would be maybe make some sort of upgrade section in between levels, which you could get points by how fast you finish a level, etc.. Then you could use those points for getting bigger bullets, etc..
Audio - Pretty good audio, I don't think anything should be changed with this.
Overall a pretty good game, but maybe some sort of upgrade system could make it a lot more fun.
C52