boring
I only played the first level because I got very pissed off at the game. It's annoying how you are just in this small arena where zombies constantly spawn everywhere and you don't feel like you make any progress in the level. You are encouraged to move around to collect bonus items for upgrades but it's really tedious with all the zombies spawning behind you, they just keep coming. But what really broke the camel's back was the fact that as soon as I killed the first boss I died. I had low hp and since the screen moved away from my character to show the exit the game decided to spawn a zombie next to me which killed me before the camera moved back. Overall good effort but the gameplay is really lacking.