Google is always innovating. They have built a flash-based game called Chrome FastBall and it's uploaded on YouTube. It's a challenge-based game where you should answer few questions on each tracks. It's very cool actually, but you must be quick enough if you want to beat the record (do a lot of practice to get better).
There was a little problem when Google announced it at first last month due to overwhelming antuasism from users around the world, but now it has been resolved and i can play it freely