Love your submission!
But I see some things I'd think would improve the experience a bit.
1 Encountered multiple times where the jump input wasnt registered or maybe theres a jumping cooldown. If its a bug and the input was accidently ignored fix it, if its a cooldown maybe you could visualize it.
2 I love it that there are plenty of checkpoints, but maybe they could also be visualized, like in super mario the small bowser flags
3 There was a stage where a breakable wall (even two) were behind the deplete confidence streamy thing, hard to decipher, maybe could also be more communicated to the player
But that being said, I think its a great submission and I enjoyed playing through it.