Thanks a lot for commenting, really glad you liked it too!
The source code is very messy, but I sincerely hope you can learn a thing or two from it. An additional tip is to always try to make things simple while coding: Godot makes it really easy to do stuff that is complex on other engines, and while this is a great help, sometimes we as developers can end up spending a lot of resources on something that could be made simpler. I'm not a master at this by the way, but I thought this tip might help you :)
Thanks for the video with the bug as well! Could you tell me which version of the game you were using? I could swear I fixed this bug on version 1.0.1 (the version at Github is the jam version, where the bug is still present... once the game is finished, I should release it's source again, with a more organized code as well!).