Fun game! Gunplay feels pretty good. I did notice a few bugs (zombie mostly out of view on the right, game randomly exiting fullscreen at the start of level 3) but nothing major. I did have to restart when the 4 ogres attacked me in level 3 because I think one of the dying ogres blocked my bullets, but on my second playthrough it was fine. I would've liked to see subtitles on the dialogue sections, some of the voice over was a bit hard to understand due to all the modulation and effects. Also why can't I reload while running? :D Also, I like how you incorporated all the items, most felt pretty cohesive and fitting due to the different flavor of each level.
Good stuff! :D