Twisty Road for iPhone
There are plenty of fancy games with amazing graphics and complex gameplay available for iPhone. You don’t need those to kill time though. Take Twisty Road for instance: it is a fun, challenging game that makes you roll along a curvy road and shatter glass to earn points.
The game has simple graphics and comes with simple controls. Simply tap and hold each side of the screen to change direction. You can jump off the road to skip ahead but if you push it too far, you lose.