Not that mame or a cannoo could handle it, but I always thought a finger controlled DDR would be a cool mini build. Show off your finger dance moves!

I'd like to recommend Gorf, simply because the cabinet style is so similiar to Tron that it would save you a lot of prep work. However, I doubt that getting the player ranking lights to work on a cannoo would be possible.
I don't know if you got far in the trigger stick plan, but if you did, Satan's hollow or Zaxxon would be cool.
Otherwise, I guess my suggestion is just a game that isn't too intense on precise controls, a few suggestions -
Bubble bobble
Elevator action
Rally X
Dig Dug
Joust