A Mario Kart–style racer, in one shot

A kart racer is not one screen. It is a track, a chase camera that does not make you seasick, karts that steer, and a lap you can finish. Getting all of that from a single prompt is what "one-shotted" is claiming here.

The comparison the author cares about is not a human studio — it is Fable 5, the previous version. For people who use these models every day, the wow is the gap between two releases, and a racing game is a blunt way to show it.

It is a game in the shape of Mario Kart, not Nintendo's game. The resemblance is the assignment; the clip is the evidence that it holds together once things start moving.