I really liked the music and atmosphere in the game! It’s quite an interesting puzzle game!
And some my gaming expirience:
The controls seemed a bit strange to me; out of habit, I pressed "S" to go down and something opened up to full screen. Then I couldn’t close it for a long time until I noticed the control hints in the top left corner. It seems like "E" and "B" are quite far apart, and it’s not very convenient to stretch my fingers to reach them. But that’s probably not a big deal since the game doesn’t require quick button presses :)
I also kept pressing "2" to open the sheet and didn’t understand why it wouldn’t open. Only later did I realize it was "Z" and not "2"; lol: D this is probably more of an issue with the font.