Really cool idea and nice execution. My only problem is that when you're fighting enemies it isn't terribly engaging, mainly because your control over your horde is pretty unresponsive so you can't really control it. Molotovs can just be randomly thrown into where your horde decides to go and kill all of them, and because you can't really react to it you just have to accept that you'll lose a lot of zombies. Still though, I like the idea, and it was very well executed otherwise. Nice job!