Amazing game, and I really love this black and white art style with an accent color.
The only issue I had was performance - after dying several times the game gets sluggish. I think this is caused by the blood splatters. I think you can either implement them differently (maybe some drawing to texture could help) or add a way to restart the level and clear these or make them disappear after a while.
Uh, and I think it has music? Heard it on the Shadow's stream but it didn't work when I played the game myself. Not sure why.
Also, the cover image here on Itch looks cut off, don't know if this is intentional.
Some nitpicks aside, great job!