The war between Mario and Kuppa clans have been settled ages ago. Now, they are at peace and would and each one would not want to start a war against one another. To keep the peace between them, they need to have some kind of bonding. Since both of them like to race, they thought of racing, but this is unlike any race since they would use a truck instead of a car. They have invited others, but it seems that only one that has the balls to race with them. Donkey Kong is the only guy that would want to press his luck against two of the main characters.
The idea here is to finish the race at first place. Choose which character you would want to represent. Start your engine as soon as the countdown ends. Drive your truck as fast as you can till you reach the finish line. Don't forget to use the booster as that will bolster your chances of winning. The booster gradually refills itself, so there is no need to hold back. The game gets harder and harder as you make some progress. Nothing is more important in this game than to win the race.