Roll a glass marble down four neon courses before the clock runs out. Ramps are safe. A drop of more than five wall stripes shatters the glass.
PhoneTilt to roll. Hold it the way you like when you start; that angle counts as level.
Touch / mousePress and drag anywhere: a stick appears under your finger.
KeysArrows or WASD. P pauses, M mutes music, C re-levels tilt.
GamepadLeft stick; Start begins a race.