It's like a labyrinth in the form of doors. Nice concept, but hella hard to play! The animation where you shoot the zombie could use some more detail too, it just disappears, without even a sound. Otherwise the gameplay is both aggravating and fun. The fake doors, the pitfalls, the keys and guns and eventually the lack of lighting, it all works towards an interesting venture through a house that is frigging gigantic. One thing that would be nice is a mention of level, or something, so you know how far you have left to go. Keep it going!