Just messing around on a Sunday Afternoon.
You will need: small chopsticks. Mine came from a ‘Kanikama Luxury Sushi Collection’ from Iceland supermarket.
It can be used with washers to create a slight slope and move sideways without losing height, or on the bottom peg as a see-saw ball capture and release mechanism.
Not demonstrated, but the see-saw can be used to hold multiple balls on one side then release them all, triggering just one new ball. Could be useful for making Dr Nim style games.