Hi rzx,
Thanks for your feedback. Most of the things you mentioned (Fix animation, empty and rare graves, and even spawns) were already on my list, I just didn't have the time to add it to the game before the deadline. Will probably do so at some point in the future.
The zombies are actually designed to be be kind of brainless (hehe), the danger comes from numbers, because every time you dig up a grave a new zombie spawns (I need to add more graves though ). Anyway I am open for suggestions. Any ideas on how to make them more interesting?
For the general gameplay I think more focus on survival could be interesting, this would also remove the need for the timer. But I'll probably make a new game for this.