I vote for keeping the game, because it's still wicked cool & fun, but if I'm in the minority, that's OK.
It used a hall effect sensor joystick (not a rotary stick), which acted much like an analog joystick, though there weren't moving parts to wear out. The sensors detect magnetic field & know how close a magnet is to them, once calibrated.
I, Robot & Road Runner also used hall sticks.
Thanks,
-Jason