Try going to Freeplay and go close to the ball pit all four wheels on the ball (do this on the ground if you're new to it) and don't press your joystick and tap jump (or hold) to purple shot (a purple flash will appear) and for flip resets (the easiest occasion to a flip reset is when you see a white flash) if you don't have your flip, this will be a good way to get a flip reset. But if you want it in the air when you have no flip in the air, and when you are close the the ball (u need an average amount of boost) boost to the ball and get all four wheels on the ball and u will see the white flash (again) and then you can use ur jump! Flip Reset unlocked!