X-Moto is a great motorcycle trial game with a lot of levels that can be played in order. As soon as you reach the end of the first level, the second one will be unlocked and so on until you are crowned as the champion of motorcycle trials. The game is a little bit tough, though.
The controls are sensible and you must practice a lot before you will be able to perfectly drive on a full track. Other than that, the graphics are pretty good and the levels have all kinds of obstacles that will not get you bored from a level to another.