Congrats on releasing your first Godot project, it's very well done! The concept works great, and the visuals and controls are very good. The level design is good too, though it's true that difficulty increases fast and some levels can become quite frustrating (I did rage quit eventually :P But I'm playing through many jam entries so less patient for hard games than I'm usually ;)).
The two music tracks are fine taken individually, but I feel they don't blend so well and see you switch weather all the time, it's a bit annoying eventually. Having two well synchronised variations on the same motif might be better :)