Physics are wonky and the blurry assets (transition screens, walls and floors) make it not truly 1-bit, but it's excellent otherwise!
During the tutorial, pretty much right out the gate I shot a wall and got killed by my own bullets, which gave me a laugh. Then I restarted it, shot the zombie and watched him go flying and laughed harder; legit tears in my eyes.
The music and sounds are unsettling in combination, and the art and enemy variety really bring it all home...but every time I shoot something and it just nyooms offscreen with that miserable creepy little "wreeehhh" I start laughing hysterically. This might be one of my favorite submissions for sheer entertainment value alone.
You did superbly on this and should absolutely 100% be proud of yourself; it's a very solid survival mode kind of game. 10/10 will be sending to all my friends.