It's reasonably fun driving around a track, but without any competitors it's not really a race!
It would be cool to see AI racers, a wider track, and laps in the future.
Are you going for a realistic or cartoonish game? With a cartoonish game, power ups and such would also be cool. You should also disable fuel if so.
Two things about the kart (I know you didn't make it, but as a game maker you are nonetheless responsible for the entire experience):