Quoted from DevilsTuner:I suggested the ball be trapped in the sanitarium (Behind the drops) then a second ball would be launched for you to knock down the drops and free the captured ball. Sorry I digress.
This would not work because there is no opto switch directly behind the target to tell the game a ball is there. Plus, there is no way for the game to free the ball because it cannot drop the targets itself. Multi player games would further compound the issues.
Rob