I like the variety of the puzzles required for the four switches, especially with the right-side switch requiring multiple loops, taking advantage of the fact that things don't reset. I also like the narrative justification that it is just you who is stuck in a time loop, so the time machine is resetting your state (apart from your memories) instead of actually taking you back in time.
The lower walls seemed sticky for some reason, though. I wonder if somehow, the foreground tiles used for the 3D effect affected collision in some way.