This post is a bit late, but now that the jam is over, I released the source code! If you’re curious how anything works, or you want to make custom levels or try to find and fix the annoying random momentum-eating bug, please give it a look. (Please don’t bug me about the code quality, it’s a jam game.) Made in Godot 3.5.

https://github.com/wareya/Cirnos-Perfect-Snowglide/