Not bad, actually.
I'm not a fan of horror flicks, but I thought you made a good choice of music, and I thought I felt a little suspense.
1.) I kinda got bored with all the walking.
2.) I thought that there would be more zombies, personally.
3.) Isn't that pistol from either Doom, or Duke Nukem 3d? (Been so long since I've played those games.)