Add content to all of the different games.

[Treblesteph]

These are the collapsible body divs. They all contain the same structure with different content:

• : this contains everything else - if no continent is selected then

  : gives instruction to select a continent to start playing - if a continent is selected then: -

  : describes game (this text depends on which continent is selected and whether easy/medium/hard mode) -

  : contains in-game options - play/pause button - changes according to button press - seconds counter - skip button - quit game button