good for a first flash
The controls were a little stiff, and I wish I could move around more. The graphics weren't very good either. You should get another artist to animate while you program, because your programming wasn't that bad. If you tweaked it up a bit, it would be an ok game. I wish there was more variety for the enemies, and more, faster moving enemies. Try making a scrolling background. It'd be better. Still, good first submission.