How are you doing physics here, what is the physics engine based on? I checked Tiny.Sim on github and it said that it's has just 2d physics?
Thinking of it, pinball makes for a pretty good demo for physics engines
I was writing my own 3D egnine at the start of the year. I eventually gave up and switch to Jolt in August.
I'd imagine that pinball is essentially 2D. Maybe some lanes and ramps would affect gravity, but I can imagine the few Z-direction adjustments aren't worth simulating everything in 3D.