a really neat little concept! Great use of the theme, it really encourages a different play style. This is a stressful game, I love it ;) I'm not very good, but I can appreciate it without having to beat it xD
I think the art was really effective, the audio worked well and the actual gameplay had a lot of depth with a really simple mechanic. Also - you managed to get a LOT of bullets on-screen with no performance hit, which definitely can't be said about many other games!
I think the only thing I'd complain about is that you're using some sort of weirdo self-extracting zip that doesn't work very well at all. Not sure why you'd do it that way, just a normal zip is all you need xD