I like the graphics, i like the sound, i like infinite ammo and how blood looks. What i don't like is:
1. Infinite spawn of zombies around you. I killed bunch of them in one place, turn left, then go to this place again, they are here. It makes the search for secrets painful. It would be better have a limited count of zombies pro level.
2. No reloading. It is annoying.
3. No run option. It makes the search for secrets painful boring. It is just too slow.
4.Weapons have one sound for all.
5.You cannot turn the flashlight off, so zombies will allways be aggro.
6. Killing zombies give nothing. No motivation to kill them, no need to kill them. But we doesn't have a chance to stealth - because of infinite spawn, very quickly spawn rate and flashlight.
7. Just grinding for medals - grinding is boring. Even for medals.