the idea of using the time scale kinda like an "undo" is pretty interesting. i could see some cool puzzles where you jump off a ledge and then rewind yourself back up to get some objects or something. neat idea.
Thank you very much for the comment. As for the rewind happens exactly that in the final part! In this one you have to jump into a pit to get a key and using the rewind you can get out of the pit to return to the door you saw before. But yeah it could be more used, thanks for the feedback! :D