Okay, i fixed some things that makes it harder with the camp strategy and makes the difference between 50 and 10 zombies bigger ;D
I'm still working on this, so i will improve it little, right now its to hard(as you can see on the score) and the birds are a little weird, but i wont work on it too hard
, the birds are not the main part of the game and i wont as i said use this to anything else then give it away here.