great job, especially for a first! Seems like you kept a reasonable scope and executed it well. As a minor note, a great addition would be coyote time - its a game changer for fast platforms like this - https://kidscancode.org/godot_recipes/4.x/2d/coyote_time/index.html
Viewing post in BoxCat! jam comments
here’s one more from GMTK, really shows it off - https://gmtk.itch.io/platformer-toolkit