I know this is suppossed to be the style of the game but I agree with Clutchin: The black mask's can feel unfinished. Odd is that you can shoot through the walls. Would seem more realistic when the walls would be damaged or removed because of the shooting?
Adding a endless mode or something should help with the getting money for the last gun.
I also noticed I could only obtain 60 out of the 72 medals, or so the game says?
Overall: Enjoyed playing through the game noticed some points that could use a boots.
Players? Did you notice not only the zombies were random but also the humans? (clothing etc) Pretty neat hmph?!