The creators of Angry Birds, Rovio Mobile, showed off an advert for the game during the Super Bowl, and the advert shows some hidden code in the game which unlocks some new levels.
In the video below, you can see the code and also the new levels that are unlocked, and it apparently works with the iOS version of the game.
The was shown during the Super Bowl to promote the new Angry Birds Rio game and also the Rio Movie.
via App Advice
