Good game. Here's some suggestions though. – Zombies GO! Fight The Dead Walking Everywhere with Augmented Reality (FREE Edition) Review

First off, great concept. But you could work on scanning the environment. It kinda weird have zombies spawning in walls. Also try to make it compatible with Google cardboard because that would just be awesome.
Review by UJA Rocks on Zombies GO! Fight The Dead Walking Everywhere with Augmented Reality (FREE Edition).