I will try to answer in order to the points of your last post:
- The number input used in the piano puzzle is directly handled by the engine so, at the moment, it allows you to put numbers up to 9.
- Yeah, that damn sprite always pops up at the worst time :D, though it should be adjustable.
- That is a known bug which I am trying to solve from a while.
- This is bizarre. When you got caught you were also trasnfered to your room, right? After that you could move, interact etcetera but not open the menu?
About the staff members banging at the door: it would be very cool, but I would need a few time to figure it out on a programming layer. I will keep it in mind ;)
About the first puzzle: you are not dumb! The subject of the puzzle itself is very specific and requires a perceptual shift which means forgetting all you know about that particular game mechanic.
Cheers.