I liked this game. The music was dope, the pixel art was crisp, gorey and colorful, controls were simple and responsive, the premise was interesting even if it was simple. Gave it a fairly high review. Some random details that can be improved:

Attack animation should show the actual hit radius better, now it looks like hi swings more behind his back

"Press E to pick up almost invisible" text was often almost invisible

Hit corpses to move them - feature or bug?

Parallax background was nice but could be  more pronounced

Mouse+keyboard control combination was a bit weird for a 2D platformer

Stairs were a PITA really. Took me many minutes to get past that part. You have to stand on one exact step and then press jump and move very precisely to be able to get up. Very annoying.

Hitting multiple stacked-up foes at the same time causes the hit audio to be too loud

Boss instakilled me, no idea how to defeat him. It's OK that he's hard and can't be killed on first attempt, but it would be nice if I had time to learn something at least.

Nice job! I had problems with staircases, but I managed to climb to the other side... And also try Better Minimal WebGL Template which I use, our game is also made in Unity.

Great job on your first published game, especially since it was for a short game jam. Here are some suggestions for your game: the staircases are very hard to climb, coyote time could potentially help with this (youtube.com/watch?v=ePoNO5P1Csc). The pickups are a little hard to notice, although that isn't a super hard fix. The combat is good but it does feel pretty slow. Anyways, good luck with game development!