I like the central puzzle, but it's not clear to me why the players would get involved with it.
Some players certainly would -- give them a button to press and they pound on it -- but I can also see a lot of players going "well, we changed it to a chimera; let's leave." I know space is at a premium, but I would probably pop the font size down one and flesh this out a bit with more reasons for players to interact with the puzzle.