No hits for an arcade game called "Rally Ridin'", no explanation of the use of an existing IP in any recap of the episode.
No HUD whatsoever - no score, no time. A double reflection of the view from behind, which is quite expensive to draw, but both seem way too small to have any practical use..
The red transparent car could be a recording of a former playthrough, but for an actual opponent the design is peculiar.
I believe it's a mockup.