Motorcycle

Moto X3M. It is the most polished of them and teaches the balance and flip timing that most of the others assume you already have before their first level.

Usually a rotation problem rather than a speed one. Landing needs your wheels roughly level with the ground, so a flip that looks complete in the air often needs a small correction held on the way down.

Yes. Moto Traffic Rider drops the obstacle courses for weaving through moving traffic, so it's about reading gaps and holding your nerve rather than timing a backflip.

Same handling, harder levels and a horror theme. If you have finished the original and want the difficulty raised without relearning the controls, it is the natural next stop rather than a different kind of game.

Most do. They run in a mobile browser and the controls reduce to tapping the sides of the screen for throttle and lean, though a keyboard tends to be more precise for the tighter courses.