This isn’t a game it’s another interactive.
You start with 100 credits. You don’t chose to bet anything you just drop the ball in the central slot and see where it comes out. You then lose a certain amount according to where it ends up.
These “lose” numbers are the damage function.
Like in 2a you have N drops but unlike in 2 each time you drop the ball you are re-starting with 100 credits rather than from whatever you had at the end of the last turn. After N drops you are presented with your results which consist of your maximum, minimum and average remaining credits across the N goes.