Racing is truly bad ass game, but drifting is way harder than racing. Ask a racer if he would like to try drifting and most of them would back out and say that it is too dangerous even for them. The object of racing is get to the finish line while in drifting, you need to perform some stunts and that could be dangerous.
Perform as many drift as you can to get the highest sore that you can get. You need to pass a certain score to be able to advance to the next level. Try not to hit anything while performing drifting since it will take out your points.