The killing sounds were funny, one of them was so over the top it actually scared me the first time.
That being said, the menus could use a little polish. The difficulty chosen checkmark is barely visible. The buttons seemed disabled, I thought at first I had to choose a difficulty to enable them, but they just stayed the same.
The intro was quirky, I liked the sillines of it. Also, the tutorial explaining how to play felt good.
Graphics were alright, I just thought it was weird that Jim seemed to have four eyes, but I guess those were his eyebrows. The enemies never seen to react, except for the moving ones. Also, there's a collision bug when you get near walls that are above Jim. His FOV disappears, as if the light source was in a part of his body that is now engulfed by the wall. Also his head keeps on flickering, maybe something to do with sorting order of the sprite.
There was one enemy that caught me by surprise because I thought it was a wall that was blocking my view, and when I got close enough I realized it was someone (like at the top left-most corner of the map). It was nice but it also felt cheap because he didn't get me.
The audio coul use a bit more eeriness. I played on Windows build and the gameplay seemed to have no sound, just the footsteps.
The ending felt a bit cheap, not gonna lie. I felt it took the silliness of the intro cutscene a bit too far.
Overall it's a functional game that could get some more polish.