Platformers are one of my favorite types of games, so I had fun trying this one out!
It's a bit rough around the edges, but that's to be expected with jam games. The overall concept is solid, I like idea of journeying through a cave to save your friend! The cat sending you on the mission does feel like a nice "Magical Girl" touch, even if the rest of the styling is a little more fantasy-esq.
The platforming itself feels a little sluggish and floaty, but I got used to it. I only lost once, to a spike pit. Attacking in 360 degrees was a cool mechanic, but I'd like to see a little more impact or something with the shots and hits. It just didn't quite feel satisfying, but it I think it's on track with a little more work.
The level design was alright. I think it could also use just a little more work to make it more interesting. For starters, instead of the many invisible walls blocking you from going too far, why not a pillar or wall, or even spikes or another object that blocks your path. Additionally, maybe a little more visual cue to help the player along. Eventually, I got the idea that I'd be diving down pits, but at first it seemed like an obstacle. A sign pointing down, or another visual cue could help flag those points.
Even though there is room for improvement, for a solo dev jam project this is still impressive. Great work!