The game needs you to grind and replay races over and over once again. Not just to master them and get all 5 stars, however also to enhance your characters aka motorists, in addition to the cars you're using and the gliders. Fortunately is that once you get all 5 star in a race, you do not actually need to replay it if you do not delight in doing so-- despite the fact that you do have this option. Rather, concentrate on playing and replaying those tracks that you take pleasure in the most - the more points you can score in each, the much better. Level up your characters and in this manner you will make more points! To put it simply, if there's a race where you can't get that 5th star even if you rank initially, then you should certainly enhance your motorist, kart and glider in order to increase the amount of points you get.