So to start with, the graphics of this game are simply incredible. I love the simplicity of them, yet they really stand out. The music too works pretty well. The environments are very moody, I love it.
My main point of critique has to do with the gameplay. It doesn't feel very responsive to me, for a variety of reasons. The movement feels very slow and floaty, which could work, but the animations are a tiny bit faster than what the movement suggests, which creates a disconnect between what I perceive on screen, and what I'm doing with my controls. As someone else pointed out, the character tends to get stuck to the walls. This is an issue that tends to happen when using Unity's physics system for character movement, which I know because I've made a few platformers using it. It works well enough for some kinds of movement, but for platforming it tends to create a lot of issues. If you do want to stick to using physics for the player, I would recommend removing friction with walls, probably by using a slippery material and assigning it to all wall objects. Lastly, there's no feedback for when the player hits enemies. This combined with the desync between controls and animations means it's hard for me to tell if any of my attacks land on an enemy, or if an enemy has hit me. Simple things like changing the sprite colour, adding particles, sound effects, maybe even knockback, all go really well to create that kind of feedback that informs the player of these kinds of actions.
Good job on finishing the jam, and with more polish this could be a really great game!