The game starts by pitting the driver against the timer; coins must be grabbed before the timer reaches zero. The next stage ups the ante by requiring the driver grab coins before the timer expires to make the opponents appear. When all opponents appear, the next stage then pits all cars against each other. The driver must grab more coins than the opponents before the timer expires. If the timer expires and the driver has the most coins, then the next round begins, with faster and smarter opponents!
Your score is based on how many, and how quickly, coins are grabbed. Good luck!