Unity Domino Goldberg Game

I’m putting together a small Unity scene that behaves like a classic Rube Goldberg domino run. Think falling dominoes that trigger rolling balls, one interaction after another, until the final flag drops. The reference piece I need to match for scope and feel is here: https://celinesproject.wordpress.com/amplify-2/

Core mechanics
• Domino-style chain reaction—no levers or inclined planes, just rolling balls knocking into subsequent elements in a continuous, satisfying flow.
• Classic look: wooden-tone dominoes, realistic physics, no fantasy or sci-fi flourishes.

What I’ll hand over to you
1. A concept sketch of the starting platform and end goal.
2. Prefab ideas for the domino and ball models if that speeds you up.

What I need back
• A clean Unity 2021+ project with all assets, scripts, physics settings, and materials organised in standard folders.
• A playable scene that starts with one click, runs the full sequence without manual intervention, and resets with the R key.
• Brief read-me explaining any custom scripts or inspector tweaks so I can tweak timing later on.

Acceptance
If the chain fires from start to finish, all physics behave consistently on repeat plays, and the package opens error-free on my side, I’ll sign it off right away.