Damn zombies, they're everywhere! I enjoyed this one, and I especially liked the different weapons you created. There were a lot of them too, and I think the fact it randomly changes relatively fast can be a downside. I would guess this was done due to the time limit, and you wanted to showcase them? I'm not sure the reason, but I would much rather be able to select a weapon before starting the game. I mean, killing zombies with a cat gun sounds fun in its own right.
Anywho, the rest of the game was pretty slick - the art, music, and overall atmosphere. Good work!