From Greenius Mobile:
Experience the adrenaline rush of a superbike racer without the drawbacks. Pit your reflexes against the needle as you reach the redline. Sharpen your skills and try as many times as you want in your pursuit of the ultimate accolade Redline Racer.
Hold your screen in the landscape position, and hit the red button to start your engine. The dials light up, the engine roars into life and youre ready to go! Tilt the screen towards you to rev the motor bike's engine, and then when the revs are high enough flick the screen back to get those revs under control!