Everything seems nice and its obvious you put a lot of effort into this. I love zombie maps which have effort put into them. Since you asked 'us' to find every single mistake, here I go:
>item scepter of vampires has typo in its description.
>gorrila quest name should begin with capital T.
>for some reason gorrila boss didnt attack for a while. I suspect that might be because I put some gold into 'increase attack range' ability.
Right after gorrila new type of creeps appears, they seem to kill me almost instantly. Only way to kill them is to use nades. Although I tested in single player, it may be easier to kill them in multiplayer.
I'll play some more when I have spare time and post anything that might need fixing
Cheers