[frumiousirc]

Pedantically, this game is at least 2D due to including time. It presents more dimensions if we consider the different LED colors.

I'm now trying to contemplate what a truly 1D pong game would be. We can't escape time so we would have to remove positional and chromatic dimensions. That leaves us with a single blinking monochromatic LED.

Perhaps the game would resemble Richmond's flashing lights.