Good job on submitting something to the jam.
I hope in a next jam you manage to make a more complete entry. Like others said before, I just fell into the void once I reached the end of the platform.
Good luck on your godot journey.
If I were you, after the jam I would try to make a few levels to finish the game. I would also add a camera to the ghost and have the cameras switch with the character.
I think if you make 3 or 4 simple levels to showcase the mechanics, you can have a whole experience and a nice first game to show others.