Thanks for the offer Henrik
If I had my own way, it was going to be a driving game in the style of Pole Position.
So I could have taken you up on a steering wheel with a bead on the shaft for microswitches!

Finding out what I did today does undo a bit of what I had planned.
In light of that, it should be considered that if you were really going for the smallest thing,
it could be something simpler and classic like Space Invaders with a mono screen,
or even Pong if there was a Pong machine, so long as the machine was made authentic.

The current record doesn't appear to be based on any particular machine though,
so I'll have to look into that.