Apparently it's the 30th anniversary of the release of Pacman today.

So of course Google has to celebrate with one of its famous doodles. Although there's more to this one than meets the eye. Apart the [I'm Feeling Lucky!] button being replaced with [Insert coin].

This one's written in Javascript (so those with NoScript installed may already have spotted something's up!) and is a playable version of the game - apparently all the way up to level 255...