The level design was fun to go through. Aside from some user response improvements like coyote time and such, the core platforming feels good. The jump SFX gives it a nice little bit of feedback that makes it more satisfying.
I really like that orange cage-like stage. Visually it stood out and the player sprite pops really nicely against it. The title screen has charm too.
I did notice some odd scaling/stretching on certain visuals, which I know you mentioned on the game page. I'm not super familiar with Godot either, but it feels like maybe some resolution or scaling settings might be causing that weirdness.
For a first game/jam, this is awesome though. It's a cool entry with a good foundation.