Not sure if it's due to my potato level computer, the red buttons don't seem to have any function?
I think there are supposed to be things that only the red cube can do or there should have had multiply rewind clones at a time.
You should just move over the red plate once before rewinding with the red cube... the 2 white plates need to be pressed with both cubes at same time.
Does that mean I manged to pull those trick off without noticing XD? Cool!