Zombies fan for years, back to when they used to call it Nazi Zombies. They need to fix these two things right now:
1) Lava/fire cracks in the ground: Ok, I get it, but do we really need to jump every time we need to go from point A to point B? Useless, get rid of it.
2) Wall weapons: You need to get really close to the wall to buy the weapon or ammo. Same with the box. Give us some breathing room when buying wall weapons or ammo.
Other than that, everything else is good.