It's quite amusing especially playing around eating ghosts around Google's logotype.
Have fun while it's still up.
Quite interesting, it seems to be made only in HTML, no flash whatsoever.
If you want to read about it: Goolge Unveils 1st Ever Interactive Doodle
You missed it...
...on the other hand if you like to game, and you have a MAC, you now have steam on your system, been screwing around with it for a bit, awesome design, definitely fits the style of the MAC ops.
To make things funner, they added Portal for free, and they added the Half-Life 2 and episodes for MAC, supposedly more are coming; I'm just waiting for CS:S.