Alfred beat me to posting my own content  :)

We recently asked a number of students to use Popfly and submit a Popfly creation (a mash-up or a game).  10 of the games that were created were picked by the Popfly Team in the Games We Love  http://popflywiki.com/GamesWeLove.ashx entry in the Popfly wiki.

I've embedded a couple games so you can try them out.  The other links are at the bottom … beware … these games are fun!

http://www.popfly.com/users/mtaipan/theGunner

http://www.popfly.com/users/solidcell/Move%20It

http://www.popfly.com/users/karafong/ChickyBang

http://www.popfly.com/users/Dauble2k5/Shoot%20for%20the%20Stars

http://www.popfly.com/users/sachint/Demon%20Attack

http://www.popfly.com/users/hcnguyen88/ninjaDuel

http://www.popfly.com/users/Borealid/Bouncing%20Babies

http://www.popfly.com/users/dinko628/football

http://www.popfly.com/users/DarkStarX1/Alien%20Invaders