I also encountered the room where everything was just dark, but seems like you already fixed it.
I like the eyes that force you to leave the orb in certain positions to progress. The last room before everything went dark (the 3rd room I think?) felt a bit janky though because I needed to jump in mid air and nudge the ball upward in order to get the right position. Maybe I didn't quite solve it the intended way, but that's what I ended up doing.
Other than that, great game! The idea is very unique and the art and music are really cool. Good job!