As a biker you must reach the end of the level, which is considerably easier said than done. Careful use of throttle and lean controls will help maintain your rider’s position on the bike, and when you’re sick of being thrown off all the time you can have a go at creating your own level.
There are hundreds of other users’ creations which can be easily filtered by popularity to reveal some beautifully-crafted levels. Chrome users can install an extension for quick access to Canvas Rider.