Great game! At first, I thought it was way too easy, but then started to notice that the zombies were spawning faster than I could kill them. I really enjoyed the music and the synty polygon characters, and I had a good time shooting zombies.
Thanks. It still feels incomplete. We would have liked more time to add weapons, more zombie variety, and a mechanic similar to your game where the zombies attack a door leading to other survivors if you are too far away. Still happy with the results.