Stunt Dirt Bike 2
This is a side-view driving game where you control you vehicle's speed with the up and down arrows and lean with the left and right arrows. After you pass some challenges, more vehicles become available.
Controls: Up/Down Arrows: Control speed. Left/Right Arrows: Lean. You must reach the finish line without crashing. The faster you do it, the better. You can select a bike or a squad.