Really fun and creative game. Combining recolor and rewind mechanics has made some great puzzles. I loved the platforming too, it was pretty smooth but I had some small issues:
-As others mentioned the character is too slow, I was holding shift all the time. I don't know if it's intended or not but almost for all jumps I had to sprint because otherwise I just couldn't jump far enough.
-Some platforms were too close to the ceiling (for example the ones near the first red color change)
-The vertical platforms caused some jittering which can be easily fixed if you make the player become a child of that platform once they come in contact. (sorry if you already knew it but it was a problem I had too so I thought it could be helpful to you)
Great job overall!