Exotic Fen
The intended experience for this puzzle does not involve looking at the source code, opening the javascript console, or otherwise hacking your browser. Reading the source code of this page or the linked page will spoil you. Your instance of the puzzle is independent from your teammates'.
The puzzle has been tested on the latest versions of Firefox and Chrome.
This text, and the following button, aren't part of the puzzle.
You should never need to press it unless something crazy happens (i.e. your browser crashes).