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marblerun.fun
Shortcuts work while the race has focus (click or tap it first).
Races run by themselves, all day: 100 marbles, 25 races, one champion — then it starts again. Choose a marble to cheer for, and the camera can follow it.
Races run automatically, around the clock. Every race is simulated from a published seed, so what you see is exactly what everyone else sees — and exactly what the results record.
Pick a marble to cheer for it. Your pick is remembered on this device and stays your marble across tournaments — even after it's knocked out, it comes back in the next one. Following with the camera is separate: turn it on from the camera control whenever you like.