This is a cool take on zombie top down survivals! I enjoyed using myself as bait and leading multiply zombies made me think of Snake in a way. Keeping the zombies population a pretty much constant is a good idea as well. It keeps it from ever being in a situation where you don't know have anything to do.
I would like it if when the zombies spawn there is a clearer indicator when they're gonna pop out or if there would be some kind of invincibility frames, so that I don't get killed right when they spawn. I envision a hand popping out of the ground or something; cheesy, but works! I think with a bit more polish this could be a dope little game with a twist on a classic! :)