The Wall Ball Game

The Wall is a questions and answers game in which successes add up and failures are subtracted. Quantities are marked by a ball that descends through a vertical wall, crossing obstacles until it falls...

The Wall is a questions and answers game in which successes add up and failures are subtracted. Quantities are marked by a ball that descends through a vertical wall, crossing obstacles until it falls randomly in drawers with different values.

In total, 7 questions must be answered. How many points will you be able to get?