Hello! ^^ Thank you very much for playing! And I'm glad you were enjoying the story beats as you went along. :)
Ah, for the rewind mechanic... So when the jar breaks in the main lab, you can rewind time with Tab to fix the jar and move forward with the puzzle. However, I did not make this absolutely compulsory in case players were stuck or confused, which is probably why you didn't need to use it. I could have done a much better job communicating this.