Temple Run is a treasure-hunting game with shades of a few other popular games thrown in. It installs quickly and launches with a short tutorial that teaches the game mechanics in about 60 seconds. Temple Run is a free download, but you'll want to buy some extra coins to buy upgrades and new capabilities.
Essentially, in Temple Run you need to run through a maze of paths, jumping or sliding over and under obstacles, collecting coins or gems as you go, using different swipes of the screen and by tilting the iDevice. There are power-ups and special abilities (like flying) that help you evade those chasing you and let you collect even more booty. But go too slow, get caught in a booby trap, or slip up even a bit, and you're caught and the game ends. While this type of running and jumping game is fun for a while, for some people the entertainment will get old quickly; for others it will last.
We enjoyed playing Temple Run and will likely revisit it quite a bit. Graphics are good, gameplay is addictive and fast, and as long as you can keep up with the ever-accelerating pace, you're in for a good time.