To be honest, it's real rough this one (Understandable for a gamejam though)
The main issue is that the core mechanic of melee just doesn't have any game feel and is very overtly broken. You used a literal rotation for the player rather than having the animation itself rotate, so she constantly clips through the ground. And there's no feedback from punching anything which doesn't feel at all rewarding. No hitstun, no effects, nothing.
And for a brawler, it's very very simple. I'd like some alternative attacks at least.
Visually, The area itself is nice, I enjoy the excuse too, (I mean the land is literally moving under her so it does feel trippy)
But the models, man the character models are the roughest things I've seen in a long time. They need clean up especially texture work wise. I know it's a game jam but man, I'm a 3D modeller and this just isn't a good standard for a character model even as a placeholder. (I do enjoy the goofy references in the models, but the texture work itself needs polish)
The concept itself is a fun idea. And I find the goofy writing to be fun too, but this game needs more fleshing out. I'd be curious to see how it grows though. It could become something good and I'd like to see you guys try to make it shine.