I managed to beat the game (apparently, got teleported back to the level with bridges). I wasn't entirely sure what was my purpose, but I assume evading zombies is a good enough reason to get going x). It was fun and the music fit the situation. What was bugging me was how the camera was jumping and some graphics bugs, like textures displaying all the wrong way.
I have a question about the character. Are they animated like a separate mesh per frame? I'm curious, because it didn't look conventional. Definitely an interesting take. (And I don't know if that was intentional, but on several occasions after pressing shift my character shifted into the zombie walk animation.)