There are several ways of starting a new game. You can use the Create Challenge menu button in the top level playing menu to create a new game seek. You can click on the Seeks panel, and click on the 'Play' button next to an existing game seek of your choice. You can click on the users list, and click on the Challenge button next to a user you wish to challenge. Lastly, you can click on the Friends panel, and challenge a friend to a game. Please see the Challenge Dialog, Seek List,User List, and Friends List sections of the user guide for more details.