Don't know if you use any type of version control (git) ? That helps a lot in these kind of situations, it allows you to go a step back. Or undo only the changes on the last work.
Viewing post in Making necklaces jam comments
Yes, I use git, everything had been working in the editor, but the moment that built it into WebGL (my first WebGL build), stuff broke. Well it is what it is, I'll get back to it later. I'm still happy with this little game, that managed to actually complete it in 6 hours. :) And with some tuning - more bounciness! competitive local co-op who completes their necklace first! - it might have promise to be published on Steam one day.