There were apparently some anomalies in this: http://pluto.kuri.mu/2011/02/03/mozilla-game-on-and-the-open...

Rapt, the winner for most fun, was posted on HN the other day:

http://news.ycombinator.com/item?id=2106102

(make sure to bring a friend, since the game is two player.)

This looks like a great idea to get more HTML5 games. Also, it brings more awareness to what you can do with HTML5.