This is just a demo version of nazi zombies. You can make your own too, this is just what I did. I made weak walls as barriers. Zombies come out from of course spawners. I stack weak walls 3x for the power ups. Note : I don't think ray gun or saw is affected by stacking weak walls, I think they hurt all the layers, and if it isn't that problem, it is still very powerful against weak walls because they're weak, duhhhh! :P :)
