This is an incredibly fun, polished, streamlined game, and a nice use of the REWIND mechanic to keep up the pace. It's obvious a lot of time has been taken to make the core game feel 'juicy' and responsive, throwing swords at enemies and catching them in mid-air just feels great.
HOWEVER, there-in lies my issue with this being submitted for a 7-day game jam. While I will concede there is nothing here that breaks the rules, I think it is disingenuous to submit this and not mention anywhere that a LOT of the code logic, core gameplay principles, and assets, have been re-used from a game you've been working on for months on your YouTube channel. I believe it's unfair for this to be competing against most other entries in this jam which have been created almost completely from scratch.
To re-iterate, I love this game and think you've done a great job, but I think it would be disappointing if this were to win the jam.