To capitalize on popular TV ad Barclaycard  created interactive experience accessible via iPhone game.

Barclaycard Waterslide

Basically, the gameplay is about moving your player left and right to hit desired purchases.  Although game's got low ratings 2.5 of 5, but thanks to massive adcampaign, the game went into Apple AppStore top 10 downloaded applications.

Campaign features user generated videos uploaded into youtube channel.

Now, the only gripe I have is that there's no Flash version of the game. People do play online games (either on dedicated sites like Kongregate.com or on social networking sites), and why would you not take advantage of such opportunity?