Its on Sega's youtube, the game seems to be pretty fun after watching most of it. Starts at around 20 minutes.
The game seems to follow Hokuto no Ken from the beginning. Later on Ken appears in a city and meets Bat, its like a semi-open world. You can roam the city and visit a few of the places like the local bar (bartender minigame), a concert/hospital OSU! minigame.
The real kicker is to travel to the next city, you need to drive your car through the desert, avoiding or attacking other motorcycle gangs, and eventually you will hit a bottleneck which is a race track you probably need to drive through (mario kart experiences) to reach the next city.