Worth Playing!
Its a nice game, worth playing it.
I found some bugs, like:
Sometimes you shoot to zombies with a machine gun and nothing happens, the weapon fires but when the shots hit the zombie theres no blood or any sound.
I dont know if it is because of the recoil, but its too hard too shoot the rifle accurately, it wont hi right where the crossair is.
Some advice for Second part XP:
1.Customizable character
2.More weapons.
3.Upgradeable Barricade.
4.2 players co-op mode.
5.And, well.... Online cooperative game mode.