This is a really unique take on "loop". Overall a fun and creative game, and a great soundtrack. I especially enjoyed the intro screen music to get you excited about the game. The art style worked well and when you get into the flow the control (singular) feels great.
I encountered two minor bugs. The first was that the "next level" button after beating level 6 didn't seem to do anything, and I had to use the level select to get to level 7. The other was that the moving platform on the right edge of level 7 was able to push me through the toggleable blocks when they were solid.
As for design, the only change I'd suggest is that maybe the purple state should have some sort of hint about whether red or blue is next. I'd try doing like a dog-eared corner on the box on the side that is next. Not sure whether remembering the position in the loop is supposed to be part of the challenge though, so maybe this isn't needed.