Think excitebike but isometric, your goal is to reach the finish line in 60 seconds for each of the 10 races. Avoid obstacles and other drivers, and gain points for how many drivers you passed. You can then use those points between races to upgrade various parts of your bike. Pretty solid for a master system game with a surprising amount of depth, but I wish each race was a unique location; you sadly get repeats once you're halfway done.