Small note for anyone trying this on macOS or Linux. In loading_screen.gd, change line 7 to:
var main_scene_path = "res://scenes/main.tscn"
Otherwise the load will fail because the filesystem is case sensitive, while on Windows it's not.
Hey versine, are you using the latest release?
That was patched by an itch.io user, and a new release was made.
You can view the latest version of this code here