This application was written primarily as an exercise in creating Facebook Applications. It was very instructive! Here is the project blog if you’d like more details //thirteengame.blogspot.com/.
It is an adaptation of a web app I originally wrote in 2007. You may play either by logging into Facebook and trying it out, or logging in here //www.angelforge.org/thirteen/LoginPage.php. To login outside of Facebook, you may either use the user name and password guest or login with your Facebook credentials using Facebook Connect.