Goal: reach 1200 points in one run. Driving through a ring: +10 × combo and +3s of fuel. Hitting a red crystal costs one of your 3 hulls. If the flow-meter or the hulls run out, the run ends.
Desktop — WASD or arrow keys steer and throttle the grav-bike; click the canvas to capture the mouse for fine steering; Space boosts; Enter starts; P pauses.
Phone / touch — the four arrow buttons steer, BOOST speeds up, and the big buttons start or restart a run.