Short & sweet! Story was fun. Delivery man does some light home invasion, learns there's zombies, rescues the girl and starts blastin'.
I liked the environment, lighting + rain + house were all cohesive, nothing felt out of place. The gun was funny and the bullet sfx felt good.
My two complaints:
1) One of the zombie types - the more brown-ish one? - didn't seem to have a health bar like the others did, so I assumed it was immune to damage or something, but it did indeed die lol.
2) The settings menu - you offer a settings menu on the home page but once you're actually in the game the settings menu stops being accessible, and the volume sliders start at 0 (rather than whatever the default is) so once you click them the game overwrites the defaults with 0.
All in all though those are pretty small complaints. This was charming and fun. Good job :)