Well, I have to appreciate you for having some good old fashioned kill em zombie game here. What I didn't like was that it wasn't that well detailed, and I didn't have much control. Maybe my computer was just lagging or something. The zombies themselves could be better detailed. At least it was fairly easy to understand. There could have also been some more detail with the environment.
I liked how you were in the same location when you advanced to the next level. Those blue zombies were pretty annoying. The sounds were fairly decent, especially with how they really set up the atmosphere. I thought the designs on the menu screen were the best in the whole game. Just brush up on your stuff and you'll go places.