Internet users were delighted to discover the animated Pac-Man doodle on Google's home page last Friday. The doodle, which marked the 30th anniversary of Pac-Man's release, was Google's first interactive logo. Web users could play the game by clicking "Insert coin". Clicking the "Insert coin" button twice allowed players to participate in a two-player game, with one of the Pac-Men controlled using the arrow keys on the keyboard, and the other, by clicking W, S, A and D. The game remained online for 48 hours before the Google doodle reverted to the usual logo.