First of all, optimise your project size. It does not need to be 500MB, then you have something really funky going on. So check what is taking up so much space when you build the game, and reduce it. Most people will not wait while half a gig downloads. (I figure this is all the music. You could easily cut down the number of tracks and compress it harder)
Nice amount of options, it's enough to be interesting but not too much to be overwhelming. The gameplay is quite fun though, I'd wished for more snappier weapons though. The roll is a bit short as well and it feels sluggish when you stop after it. I really like the way enemies spawn and weapons change, it makes it a lot more interesting and gives you more options to engage.
Great work! I'll come back and play this more when I've checked out the other jammies :D