See how far you can get away without crashing.
Drive your slotcar. Change lanes by tapping left or right. Avoid other cars, and collect coins.
Spend your cash on upgrading to new cars to use. These give you more lives in-game.
Watch out for police cars. You need to smash the police cars or they'll get you.
Cash values increase the more coins you collect. If you let a coin get past you, the value will go down again.