Space Crossy Road takes the endless-hopper format — cross lane after lane of moving hazards, never stop moving — and sets it among asteroids, ships and alien terrain instead of roads and rivers. The rules are the same as the original: hop forward, time the gaps, and don't linger.
It's a good example of why the format spread so far after Crossy Road: the mechanic is complete in one sentence, and any setting can be dropped on top of it without changing what makes it work.
Yes — the same endless hopping format with a sci-fi setting instead of roads and rivers.
No. It's endless; your score is how far you hop before being hit.
Yes — tap to hop. It runs in any browser with nothing to install.