Visually very pretty and the music was nice, but I didn't like how the game felt to play. You simply drop too fast (ESPECIALLY when hitting your head on the ceiling) to be able to reliably react fast enough to do some of the precision platforming required, making it much more frustrating then it needs to be. I didn't like that I was able to cling to/slow fall along walls from the start but never got the ability to actually jump off them. It felt weird and kind of clunky. You also move forward a bit too fast for aforementioned precision platforming. It was very difficult to land on ledges in front of spike walls. There's no reason to ever fight enemies outside of ones that physically block your path. It all combines into an overall experience that's just kind of frustrating.
The boss fight is fun though. I liked learning how to deal with it.
(I think I would otherwise really like this project but right now its left a bit of a sour taste in my mouth. I do think you can definitely improve it further by ironing out the player physics a bit more and adding actual exploration/goodies to find; I understand that the game jam doesn't leave a lot of time to do those during the jam but yeah.)