Fun short game with decent challenge. Love the benevolence of not putting players way back at the start of the level for every mistakes, since I die alot in these kind of games XD.
Controls are tight, and every death feels fair. While the ambiguity of jump distance/height is present, the 2nd jump and mid air pausing is such a genius way to counteract it, since I could essentially "correct" my mistake in my first jump.
Not quite seeing the theme implemented here though, or could also be I missed a secret or something. Otherwise, you could have some optional collectables that leads to a different ending maybe?