good effort
this game could have been amazing. but it's brought down by the fact that it's so frustrating to play. your fellow survivors do fuck all. your shots often pass clean through zombie heads, without doing damage. and when there are 10 of them beating on the wall, the bullets you fire at one of their heads invariably choose to penetrate another zombie's leg, rather than the head you were aiming at. to conquer this problem i had to start from the top of the wall, and work downwards, shooting each head as i was going. because the game engine simple doesn't work well when there are zombies on top of one another. hopefully you'll find some way to fix this.
all in all, i like the ideas, graphics, everything is great, EXCEPT the gameplay. and the gameplay is the most important thing about a game, so i can't really give you a very high score. disappointing