I found this game to be pretty enjoyable. It really was interesting to see zombies with guns. Oh wait, that was already in "Madness Combat". Anywho, I was surprised by the gameplay. It was weird to tell when I was taking damage. It still worked out pretty well overall.
I thought maybe I was supposed to rescue the people with guns. That would make them stand out from the zombies. I liked how you walked forward. The layout made it look like the zombies just came after you.