Draw Climber has one of the best ideas in casual gaming: you don't control the character, you draw its legs. Sketch a shape in the box at the bottom and your blob grows that shape as a pair of rotating limbs — long thin legs for speed, a big circle for rolling, a tall hook for climbing a step.
Every obstacle on the course wants a different shape, so the race becomes a series of quick redraws under time pressure while rivals do the same beside you. Voodoo published it, and it spread because nobody had seen a control scheme quite like it.
Draw a shape in the box at the bottom of the screen and your character grows two rotating legs in that shape. Redraw at any point to suit the terrain — long legs for speed, tall shapes for climbing, round ones for rolling.
A long thin rectangle for flat running, a tall narrow shape for steps and walls, and a circle or wide arc for uneven ground. There's no single best — swapping quickly is the skill.
Yes — draw with your finger. It runs in any browser with nothing to install.