From IndieGames:

William David, a developer for Ubisoft, decided the best way for him to quit would be through the same medium, but in a rather different style. The combination of style, music and message make this an entertaining experience and by the time I had walked my way through it, I myself was willing William on to do great things. His plans are to continue work as an independent developer.

Talk about an effective way to market yourself, literally, from day one.

[check out his resignation flash game at Newgrounds]