This is Delicious
Well done top down shooter. While there is many shortcoming, I don't care about them due to the fact this is a well done Arcade style game. I pretty much got how to live endless waves of zombies pretty fast, which helped. Upgrade/Level system pretty much gave the game the depth it needed.
However I see people arguing "Fast Zombies" as a pretty weak point, I mean yes walking speed may seem at tad to slow at the start, but what zombie game doesn't have fast zombies? Go play Halo Reach on easy or something....