I dont know if you were already told, but you have to hit B and use the thumbstick to tilt towards you. ALSO, when you hit a banana and dont spin out right away, brake and youll save your self from spinning out!
If you have an n64 controller, hitting the left and right yellow arrow keys will change the format of the racers, you can even see what they have or if they have been hit
The funny thing is when you were complaining about the length of Wario stadium and brought up rainbow road allegedly being long, you'd probably still be on your first lap of rainbow road