If you are looking for a racer with some teeth, that is easy to learn but difficult to master, then look no further. This one has some hot tracks, some hot cars, and some fast boosting. There is optimization to be done on which car is best for each track I think. There doesnt seem to be any way to save progress, so gotta unlock things every time.

Final Circuits of Rivers - Normal (Time Displayed) - 10:57