Karts will accelerate without requiring to hold down any buttons.

This setting can be found during the screen where you select your kart. Press + or - button and then press R

Keeps Kart on track and prevents falling off. It does not follow ideal path it is still possible to fall off in certain cases)

This setting can be found during the screen where you select your kart. Press + or - button and then press L

Allows for steering by rotating controller left and right

This setting can be found during the screen where you select your kart. Press + or - button and then press Y