When you are in a race, you need to focus on the road or you will surely have an accident. This is unlike any normal driving since speed is the key to win it. Every racer will be at their top speed and if you are not competitive then you can't take home part of the prize money.
The idea of the game is drive your car in a racetrack. Keep your eye on the road all the time and grab the money that you can see. The money can be use for spinning roulette, which will allow you to get a new gear or just double your money. But, just like gambling, you can lose anytime and don't get anything from the slot game.