It’s clear you’re in a good mindset, it feels like you partially followed a platformer tutorial, but didn’t just copy and built your own unique game using the tutorial as a sort of base. That’s pretty much exactly how I started, I’m doing pretty well right now.
The non-colliding platforms were a bit evil but I suppose you didn’t have many other choices for adding difficulty.
I noticed this is a multi-submission (submitted to 3 different jams), I don’t suggest that for the future.
Overall, good job for your first game!