Interesting to see a different approach to the zombie theme! :D (my game is also about zombies).
The game itself is well made. It has good sound and music, and the graphics are fine too. However, I think the game is way too easy. It takes a long time for the action to start, and because of that, the game is neither challenging nor chaotic, which is a bit unfourtante.
That being said, the game is still well made and worth a try!