The music fits well (I know you not made it, but it fits well), the game fits very well to the theme, but the game have some issues, I think it would be cooler if the army of zombies go around you when you hold the space, and not like going and pushing you around. I think the camera was strange for the fact that you sometimes have a big distance of view and in certain levels your distance view decrease. The distance of the view of the humans is confusing because I don't know if they were see me or not. Some small issues now: the collision box with the other zombies is strange, the zombies is slow for me and the final level need to have a exit button and a to main menu button too.
P.S. The humans don't demonstrate fear of me, if I'm coming for him he only stays there.
P.S. 2 Oh, and you have to show us the army feature before the circles around you level, in a more calm level.