I think this is the best take on the whole "Environment changes out of control" interpretation. Really clean design.
It's always clear when the rotation will happen. But it takes some time to visualize how the rotated environment will look like. It's also distracting to look away from the level. Perhaps you can have a transparent rotation arrow in the Background image layer of the level. It might be too intrusive for some people though.
The music is perfect. I think you can improve it further by syncing it with the rotation shifts.
The only complaint I have is that the control can be slippery. I found it extremely hard to control mid -air velocity. I also got stuck in the colliders sometimes.
Overall, great job!