Great job and this entry, and it's very impressive as your first Godot project! The procedurally generated levels are very nicely done, and while the gameplay is a bit tough to master, after some practice it works fine (I struggled especially with having to hold right on a right wall to jump left, otherwise you fall).
The graphics and sound are very nice - could use a bit more cohesion in the visuals as John mentioned, but overall it's pretty good already for a 3 day jam.
The theme interpretation "works", although not very original ;)