Hi Shela, great idea. It would be so visually interesting, and if you could get audio then it will be amazing.
In my old game development days, I would code this in javascript with some sort of rudimentary physics engine.....
Unfortunately that's not as easy in Storyline, so I would actually go for something easier. First create enough individual videos of the plink dropping down different paths using some.animation tool or after effects etc.
Then just randomly choose one outcome in storyline, and play that video.
Easy but effective! 😋👌