And now I've also solved
#BoxTwo... and it's a piece of crap :P Honestly can't recommend it at all.
#BoxOne was fantastic; BoxTwo was an unfun, broken experience. (Literally, in the case of the key, which promptly snapped! I had to use an Allen wrench to start the damn game.) Please just do better,
#NPH and
#Theory11. Or don't, as I'm definitely not buying a BoxThree regardless.
#puzzle