Firebird must have a real winner here - ninjas, scooters and simulation games are all real trendy right now, so Ninja Scooter Simulator will sell by the million, even though it has nothing whatsoever to do with Ninjas or simulators. Ninja Scooter Simulator is actually a rip off of Metrocross.
You must scoot across from left to right along several courses, dodging various obstacles, such as walls, holes and bouncing skulls (!!). Some objects help you, giving you extra time or turbo speed and you can use ramps to perform 'rad Ninja stunts'. But you must time your leaps carefully or you'll end up doing yourself a ninjary.
There's been a cheapo game like this released before, called Star Runner or something, but this game is far superior. The graphics and presentation are first class and it's both very playable and pretty addictive.