Memory Game
This is a simple memory game using thumbnail images from your list of friends as cards. It uses the friend list from the person who installed the app.
Select from 3 difficult levels and try to discover where your friends are 
.
After that, you will have some time to memorize (the faces in the screenshot are blurred to preserve the guilt identities )
The game begins. Try to find each pair of images until there is no one left.
Once a pair is revealed, the card turns into a link to your friend’s profile.
This is a work in progress, and I tested it only in Firefox 2.0.x and IE 7.0. Also, I only tested it in Orkut, but I guess it should work in other containers with small modifications.
To install it in Orkut, you should either be in one of the countries Orkut has released the OpenSocial container for production, like India, or have access to the Orkut Sandbox.
This app is not listed in Orkut app directory, so you should enter the app link manually in the My Apps page.
The link to app install is here.
If you find any bug, feel free to contact me.