That room key "puzzle" was idiotic; not surprised they changed it. I whipped out a pen and paper in the hope that it would be a symbolic representation of some non-decimal numeral system and I could actually have fun trying to solve it, when in reality it turned out to be something from a children's book. I guess I'm too used to playing all those crazy room escape games so I overthink this stuff.
I really enjoyed the game, though, but more for the ambience than the puzzles. Second best purchase of the Steam thanksgiving sale I do hope they make more.