Players will need to be registered and logged in before they can enter the private game. When logged in, clicking the following URL will take you to the join game page:
Alternativly, you can select "private games" from the menu and enter the number "1174" into the box. The game password is "focus". Take care not to accidentally join a public game by mistake.
register via an email address, create a username and join up
This is easily the most addictive new game on the web