First of all, good job: you made a game in 72 hours and that's no easy feat. I'm not sure if it was only me, but I had no sound, but I assume it was a glitch on my end as there is credited music and also a music switch. Unfortunately, the lack of sound made it a lot more difficult to understand what I was doing right/wrong.
I do think the game was a bit on the buggy side (the player wasn't orienting correctly depending on the direction of gravity, so I ended up walking on my head most of the time), and overall there were just a lot of small things that could be improved for next time. Mostly I'd also recommend adding visual feedback for when you get hit, (that's something I myself failed to add in my game). In addition, some of the challenges (again, I don't know how much audio would have helped) seemed more cryptic rather than puzzles.
Overall, I think this game has a lot of potential but unfortunately is hindered by the short development time. Although the circumstances of my playthrough were a bit unfortunate, I do believe that game was at the very least somewhat enjoyable. Anyways, even if this game has fallen a bit short on some ends, there will always be a next time, and I hope you keep on improving!