I don't like it too much.
NICE GAME! What is the genre of theme song of the game? or name?
Don't change my weapon when I pick up ammo for a different weapon. That's incredibly annoying.
You move a little too fast, enemies are strange, and you jump ackwardly. It has a good foundation, but with Zombotron 2 just released and being much better, I cant see a reason to play this right now. Had this come out a month earlier, I might feel a little different though. Good effort!
Everything ok, except green balls arent interesting enemies.