Pretty cool! I like it quite a bit, and it's very impressive for a game jam. If you are looking for opinions here are my 2 cents:
I think the gravity for the player should be a tad bit stronger, it feels a bit floaty at the moment.
I don't love that I can only attack once midair before landing. Paired with the floatiness can make it feel a bit unresponsive at times.
I don't know if there are i-frames when the player gets hit, I didn't notice any. If they are there, I think it should be a bit more clear. If not, they really should be there :D
Keep in mind I've been playing silksong nonstop for the past week, so some of these might have been influenced by that. If you are going for that kind of feel, I think you should take these into consideration.
These are just nitpicks though, great game for a jam. Congrats!!