Try turning the game's speed up to eleven. Do a fast lap in time trial to really test your skills.
Where are your limits, and where are the limits of your world?
Take your local friends and family on a trip into the hyper-future.
You wanna be fast, but still you don't wanna scratch that new space ship of yours.
Do 20 consecutive time trial laps. Simple as that. Just get into the flow and keep racing.
Collect enough XP to unlock the second track in the game.
Relax, take it easy. Slow down for a while and enjoy the game in super slo-mo.
Show that you are one of the pros by beating the pro time trial difficulty level on all tracks.
Not crashing only means that you are not pushing it hard enough.
Spin and jump through the level while still maintaining a fast racing line.
Why only collect a few stars if you can collect them all? Go out there and find them all.
You haven't seen the game until you've seen all the tracks. Still, there might be more to it.
Try using the turbo rings to add a little extra speed to your tricks and spins.