Good for what its worth
If i may offer a few suggestions
the high detail craters next to a low detail backround seem out of place . if you need help creating a better balance between backrounds i would be glad to help. i like how you put someone in a story instead of having pictures but a little bit more flair would be helpfull. i rly like how you see someone fighting the zombies while you are fighting them i think overall its a decent game but it could use a few touch ups.....sorry for rambling :D