I know today's not Friday. But this week's game is just too good to make you wait an extra day. Heck, I've already been playing quite a lot. The game is called Dolphin Olympics. And I think what makes it so good is that the controls are really simple (one hand), the learning curve is like 3 seconds, and the replay value is huge. I can see coming back here daily to blow off some work related steam for 5 minutes.
Anyway, check it out. My top score so far is 113,460, highest jump 31.42 M.