Terrible
It might keep a 6 year old entertained but that's it. The music is... ehh just whatever. I was liking the idea of all these different zombie type games packed into one until I realized they're ALL THE SAME!
I couldn't stand watching any of the shooters walk around like they did. Personally, I prefer turret ones better. So I tried out the turret ones. The mechanics were god awful. Seriously. How the HELL am i supposed to swing around shooting zombies or whatever the hell you throw at me, when I swing my turret around, and the camera shift changes where I'm shooting!? I flip around the turret and I'm no longer aiming at what I was going for. It makes the game really hard in a very VERY dumb way. I couldnt get past day 3 on any turret ones because of this.
"and make a crappy game mocking the genre. Then I got carried away and ended up working for weeks on what turned out to be a pretty fun game. ". Well you succeeded im making a crappy game.