Here you compete with another to beat them with points or generally try to climb the leaderboards in score. (articles.gamerheadquarters.com)
You also climb leaderboards and are awarded stars and money that you can use to purchase additional gear including clothes for your character and upgrades for your bike. (videochums.com)
If you're serious about climbing the leaderboards, you can head into training mode and artificially create your own lag, so you can perfect the timing on those tricky combos. (stuff.tv)