Had a lot of fun with this one!
I was a little stumped at first because I assumed the directionals acted more like tank controls (like, A would always rotate you 90 degrees counter-clockwise from you current orientation). Took me a while to realize how it actually worked.
I feel like a first screen fully lit up where the player could freely get to grips with the movement mechanics, before going into the dark levels would help alleviate that confusion.
I also feel like there's a bit too much information, too scattered and presented too quickly at the start of a level. I need to memorize the screen layout, read the hints at the top, read the step counter at the bottom corner, all in a very short amount of time. The little text blurb also obscures parts of the screen (sometimes hiding the exit), making this extra tricky. Maybe giving the player a little more time before turning off the lights (or maybe even waiting for a button confirmation) could help a lot. Also, maybe keeping the step counter visible even in the dark might help players understand when why their input doesn't work sometimes.
All in all, I feel like this game is really well-rounded. Well-though out puzzles, great use of audio feedback, clean, readable visuals and a solid integration of the secondary theme. One of my favorites from what I have played so far!