This is actually extremely good compared to a lot of the games in this Jam!
The player controls smoothly ( while I originally considered the jump a little floaty, it ended up growing on me and felt normal after a while ), there are nice level design skills shown ( introducing a mechanic/gimmick, iterating and improving it, then pulling it all together with a twist/challenge at the end ), and I appreciate the fact you kept introducing new mechanics ( moving platforms, ladders, double jump ) throughout the span of this short ( but impactful ) game.
You used what seems to be free assets, but despite them not being fully original ( from what I can tell ), you definitely did the most with what you had when it comes to the graphics ( nice use of decorations, structures, and level assets )!
Only complaints: The player feels a bit floaty, and the game could have been longer ( even if only by a little ), but I am genuinely impressed with what you've made, as most people sadly rushed/didn't take too much time to polish/playtest their projects to make sure they are playable/have interesting gameplay.