We do plan to finish this project, and it will remain playable on itch.io. It will not be done before the jam ends, but we will try to fix the puzzle before the deadline.
Thank you all for your advise, and have a great day!
edit: I am trying to fix the bug in the puzzle, but struggling because it works in my editor. I think it may have to do with exportation, because it doesn't work on itch. io or gd.games.