Steer a glass marble down an isometric obstacle course against the clock. Ramps hurl you forward, steep chutes even faster; narrow bridges and cliff edges wait to drop you into the void, and a fall from too high shatters the marble. Black marbles try to shove you off the edge and acid slinkies patrol the bridges. A fall costs time — you restart at the last flag — while gems add points along the way. Reach the checkered finish and the seconds you have left carry over to the next, narrower, steeper course. The run ends when the clock hits zero. Free, no sign-up — play right in your browser.