Well done, really nice game!
I was also thinking about taking inspiration from SUPER HOT, but I couldn't figure out how to make it work. The way you did it does work to some extent, but I'm not sure how much it adds to the SUPER HOT formula. I mean, you could finish the game without walking backwards. Maybe there's something else you could have added/changed to make the rewind more integral to the gameplay experience?
I'd really appreciate it if you would have a look at my game as well, and be sure to download the smaller version :D