Figure 8 sees you riding a bicycle across an increasingly dense series of black-on-white diagrams. Despite its top-down perspective and the abstract nature of its obstacle course, the feeling of steering a bicycle is conveyed extremely well through the controls.
You have to avoid black lines, but you score more points for riding in a straight line and also the closer you get to each obstacle. Checkpoints offer their own risk/reward scenario, requiring you to circle them to activate them, which in turn wastes precious time.
It gets pretty fiendish later on.
Figure 8 [Intuition Games]