Very good idea!
You should warn people to play in full screen, because otherwise the walls are cut off and i could not even see there were any, confusing me as to why i can not pass the “obvious” space.
I had to use the hint you gave in another comment to get past the room with the four lights. Maybe it would be convenient to add it as an in-game hint when the player is stuck there for some time — like a second note that appears or something like that.
Had fun with this one.