This is a rough idea of what the main display panel will look like.
The green button starts a game. The light can pulse when waiting to start and glow when in play.
The knob below it selects the game with the game number displayed above it. When you select a new game it resets whatever is happening.
The four number displays are used for different functions by each game. There is a potentiometer below each display it needed for the game (for example, to set ball speed). The LED next to the pot shows whether it’s active. I may only have two pots instead of four.