Tested simple mobile app at the Digital Shoreditch Festival on Saturday 7th May, 2011. Thanks to Chris Lane for organising the event since I was remote.
Rat Race links sms messages to a Flash client via SQL and PHP. Players are represented by the constantly-orbiting rats, which they feed by texting the answers to clues. This makes their rat grow bigger and faster. The game screen also shows how many times clues have been answered correctly - represented by girth of small cheeses.
This screenshot shows the game in progress on Saturday afternoon.