Great game, although it is very difficult. The first few tries, I died almost immediately. I soon learned that the best strategy for long-term survival was just to stay still and constantly shoot at the zombies, which I'm sure was not your intent. I think the reason for the difficulty might be in part due to the fact that you are in a maze. If you try to navigate the maze, there's a pretty good chance you'll run into a dead end, which is basically a death sentence with how fast and frequent the zombies are. Also, the fact that the zombies are unaffected by the walls. I think this could be fixed by adding some pathfinding to the zombies. Other than that, the art and sound effects were good, and I think this could become a pretty fun game!