It was alright.
Overall it was a nice game, but there are many things to improve on.
The zombies; The zombies were too bland, lacked variety, and took 5+ shots to kill. I found this very annoying. Add a bigger variety and maybe make them easier to kill.
Dying; I don't know why, but after I died, I seemed to still jump around and stuff, but not be able to do anything.
The art/visuals; I felt that the art was too sloppy and confusing on the eyes, meaning it was hard to focus with the annoying background.
Camera angle; I couldn't walk anywhere without the camera screwing me over. Try and keep the character with the camera.
Area: The area was really boring. Maybe next time you should include an interactive terrain and/or buildings.
Weapons/reloading function; Maybe allow the weapons to be kept even when out of ammo and provide ammunition for the deaths of zombies, etc. As for the reloading function, it was quite annoying, maybe allowing the payer to modify it to their liking.
Zombie deaths: Provide more than one death animation for each zombie, because the same exact death for every zombie is a bit of a turnoff. Maybe even ragdoll physics?
Glitches: there were many glitches in this game, next time have many people beta test the game in order to provide the best glitch free game you can.
Nicely done, I see potential here.
P.S. Why were some guns named after airsoft guns? (ex.the shotgun)