When you get them all type the code in and get 300 crystals.
I'll update this each time a new part is revealed.
As the note says, even if you know the code you can't get the crystals until the whole code has been revealed.
300 crystal code
10/16: E ? ? ? ? ? ? H ? ? ? R ? ?
10/17: E ? G ? ? F ? H ? ? ? R ? D
10/18: E ? G E ? F T H ? ? O R ? D
The code is most likely: EDGEOFTHEWORLD.