Terrific game, and a great take on the theme! The art is lovely and the basic game idea is super fun as well. The tip to play the first few levels with a screenshot on hand was a neat idea, too, I would've gotten really discouraged without that. The music and sound design were cool, and the "transition effect" and presentation were excellent. (Although it was a bit uncomfortable to read the help text ingame, not sure why.)
As others have said, I, too, would've been really happy to have the game tell me what I got wrong, but it's no big deal.
Also, the folder name in the downloadable version ("ForFuckSakeIWannaSleep_windows") is super relatable ;)
Overall, an excellent take on the theme. The player gets to know a single room by heart in order to "git gud" at the game.