You get an eight
Well done, it liioks like you put a lot of work into this game. The only problems that I can find are these:
The looping music got on my nerves after 10 seconds of it, it was just annoying from the start. I turned off my sound and found that I played the game a lot better without the noise. If you have music you dont want it distracting.
The game got boring quick. There were no powerups or any cool new guns, it was the same green laser and the little health kit it you were lucky enough to kill one of the big guys.
Also, it was a little bit too hard, I think you should make the game longer and give the player 3 lives.
Other than that it was kick ass, keep up the good work, you have the ability and talent to be one New Grounds Finest!