I played it with a friend a while ago. It was shit, and we deleted it after approx 5 or so hours of wasting our lives. Really, there is no reason to play this thing. But hey, maybe it's just me- I started to hate every game that is wasting my time with pointless shit. If it would have some kind of storyline which you can finish, then I'd be like "yeah, ok". But right now it is just run around in a fixed gameworld, kill some stuff, destroy some bricks, and be done. /Edit: Of course I forgot to mention to exploit the stupid zombie AI. If this game (and all other of this type) is survival, then damn, survival is fucking easy.
Same shit you see spawning everywhere in early access on Steam currently. None of these games has anything unique to it.