Today's Google Doodle is an alarmingly compelling card game about defeating mankind's oldest enemy: The Moon
If you head over to Google (that's google.com, if you need the URL) you'll find a neat little strategy/card game that someone in Mountain View presumably cooked up in the free 20% of their work day. It's themed around the lunar phases, and sees you face off against a persistently chirpy half-moon in a quest to amass points.