This game is using Flash! After the 31st of July 2019, your internet browser might start blocking Flash, especially if you use Google Chrome. This means you'll have to activate it to play this game.
When it comes to racing titles, a lot of people might view "winning" as simply annihilating your friends in competition and consistently coming out on top. Bragging rights hold lots of power, but there is a real way to officially "beat" Super Mario Kart and see the true ending that was intended for dedicated gamers.