Wow, truly excellent work! The oppressive atmosphere, simple yet evocative pixel art and animations, and overall high quality of effects work make this feel very polished. A lot of elements reminded me of Hollow Knight.
I did have a couple of pieces of feedback, though. The jump feels way too floaty, I would recommend adding additional gravity on the downward arc. And the movement forward when attacking was difficult to get a hang of, I often found myself getting damaged by moving into the enemy as I attacked. But I feel that if you iterate on these game-feel pieces, you will have an beautiful, immersive work on your hands!