Rolla: Shape Your Wheel

Rolla is a terrain physics puzzle drawn in a sketchbook. The course ahead changes from tarmac to gravel, sand, water and cobbled hills, and the only tool you have is a pencil: draw the wheel that fits the ground, while the car keeps rolling.

Every sketch is analysed the moment you lift your finger. Rolla counts the corners, measures how round the shape is, and tells you how well it fits the surface under the car and the one coming up. A pentagon grips gravel. Six corners bite into cobblestones. A triangle paddles through water. A circle flies on tarmac and fails at everything else. There is no right wheel, only the right wheel for the next fifty metres.

• 100 hand-built courses across five grounds: track, gravel, sand, water, hill • Shape analysis on every drawing: name, corner count and surface fit, live • A surface report after every run: where the seconds went and how the wheel fitted • The first courses pause at each new ground and show you a shape to trace • Three wheel sizes: a big wheel bridges bumps but carries more weight • Five vehicles, each faster than the last, drawn in the same pencil style • Nitro for the moments you drew the wrong shape • Coins from the course buy nitro, wheel time and vehicles; one optional coin pack • Free to play. No account, no ads, no timers.

Built from scratch: its own physics tuning, its own shape analysis, and every line drawn by hand.

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