Mario Kart 8?
As guessed by S.Peelman, the game is Mario Kart 8.
Well, what to say about Mario Kart. The whole series is a great fun-racer. Perfect for couch multiplayer. Mario Kart 8 has great mechanics and a lot of content (at least if you include the DLCs) so it makes the list.
Between the many single- and multiplayer-modes and great roster of drivers and the big amount of cars to choose, you can have a great lot of fun and get to the game later anytime.
That game single-handedly kept the WiiU for some time on elevated sales-levels. It's recent rerelease on Switch includes all the DLC.