Check out the full description on the YouTube video for the scoring system on Gameplay strategies. The following are excerpts:
The machine uses 3 motors. A corded power drill powers all 10 chain lifts. A second motor powers the moving ramp, the multiball door, the mini door on mini pinball, and the spinner. A third motor opens and closes the blue mini pinball trapdoor when activated.
A Makey Makey is a circuit board that plugs directly into a laptop and is used as the input for the program that displays the score.
To start/reset the game, the player first pulls the grey knob. This action moves a lever which pushes all 3 starting balls from the upper holding area into the lower holding area, ready to be launched. The player then pulls back and releases the red knob, which launches the first ball.