Great Job
Really like it and was fun. A few suggestions...
Kinda easy. Even if you don't play you won't die till level 5. Plus you get points when the guys explode on you. theoretically you could just buy shields and never lose. Maybe have the shields max out at 100 or something.
The menu button after you die is broken. I figure nobody noticed it bucause nobody died. lol ;^)
Other than that, awesome job. I liked the depth you put in, like each enemy having it's own amount of hits, and how the higher level weapons would burn through the lower level enemies but not the SS. Gave it a little strategy. Keep up the good work.
-VC-