it was an interesting experience and quite fun... But I felt more like I was playing a puzzle game than an action/physics.
And that made the physics of the cube and the platformer controllers seems kind of disrupting.
I can see the entry and exit of the level acting as a "Cheat sheet" of the color changes, but I think I would still like to have it in my UI...
It's frustrating having to change the colors without having certainty about the change and there is no time to have it memorized.
And if the level design is simply going to ignore the possibility of color changing as a mechanic (Just keeping choosing between forward and backward) I'm not sure if it is improving the experience.
But overall it was quite fun. I finished the bonus level as well. Good Job.