Washington Post: "Saddle up and surrender those work hours — it’s time for a little digital horseplay.  To celebrate the 155th anniversary of the Pony Express today, Google has created an addictively interactive video-game “Doodle” that’s now running (and running) on the search engine’s home page.  “This game is about overcoming the elements,” Matt Cruickshank, the Doodle’s lead artist, tells The Post. “It’s a simple game, but it has a few surprises.”  One of the surprises comes at the end of this video about the making of today's Google.  Read more.