The concept is really cool! The art, music and voice acting are all pretty cute too. A nitpick I will make is that I feel like most puzzles could be simplified further to their core idea and be less cluttered. I feel like some later puzzles could also make more use of the knotting mechanic. Then again, there are lots of possible interactions with the mechanics in play here, any you did incorporate something new in each puzzle, so it's totally fair.
Also, I encountered a little bug in level 7 where you could go beyond the allotted moves by undoing, in case it went unnoticed so far.
Congratulations on the submission, great work!