Nice, that's a solid platformer! I've seen other people talk about the wall jump, so the only thing I'll say it that I agree that space would have been much more useable. I really liked the risk-reward balance that came with the checkpoint currency; the dynamic it added was fun. Aesthetically, it did suffer a bit from that Unity camera stutter (was it using the standard Update or LateUpdate?), and the music cutting between levels had that popping effect. It also got a little bit repetitive, but you added a volume slider, so that was on me.
Regardless, I very much enjoyed the sprite animation, and the trail renderer was a nice touch. I also thought you used the color palette excellently; the cool environment contrasting with the warmer obstacles made everything readable. That's a lot of content for a 3 day jam, well done.