You can use the WASD or the arrow keys to ride the motorbike.

Your main goal is to finish the road at each level as fast as you can. Thus, you can always keep an eye on the chronometer you see on the top right of the screen. To better ride your bike and complete the roads faster, you can upgrade your speed and tilt with your coins. What is better is that you can also unlock new motorbikes with the in-game coins you earned. When you successfully complete one level, you will see that new levels with new storylines will be unlocked, too.