Meh

Definitely not terrible. Controls are a bit iffy, zombie spawning is too random. You cant know if youre in danger unless you hear the zombie coming first which is rare because zombies are so fast they normally get to you before they make a sound. Their ai is also a big glitchy as they jump A LOT. The survival aspect of the game is good though. Scale needs some work but all in all great for a mobile game. :D
It kind of reminds me of unturned!

Hatcherfan50 about Pixel Z - Gun Day