joingame.html

<html>
  <body>
    <div id="introtext">
      Welcome to msg!  This is a turn-based strategy game which you play with other people, entirely in your browser!  It requires no plug-ins (e.g., Flash), but you should have a pretty new browser, as it uses several HTML 5 features.  You've been invited to this game by {{ opponent }}.  You need to have a gmail address - we may support other forms of authentication in the future.  Feel free to look around the site.  When you want to start, just click on the link below!
    </div>
    <div id="startgame">
      <form action="{{ url }}" method="post">
      <input type="submit" value="Join the game!"/>
    </form>
  </div>
  </body>
</html>