Nice concept that player plays as zombie killing the remaining humans. I can only managed to reach level 8 with 3 stars rating.
My only problem is that choosing zombie can only be done from previous levels and some level seems need certain zombie to get 3 stars rating. I had to go back to level 2 just to to be able to choose the 4th (to break the woods on the door) and 5th zombie (to take down human above building) which seems some levels require those zombies. Good luck if you planning to update it :-).
Also good job and hello there from fellow 1GAM participant. Good luck for reaching 1 game for each month if you are into the challenge ;-).