This is a free to play, no sign up required domino rally simulator. You design them with the editor, and then run them in the 3D player. The from-behind "Chase" view is best.

My mum helped develop it - she submitted issue reports direct from the app itself (make it possible to bend the domino tracks, make the playback controls disappear while mouse inactive, add like buttons to the showcase, let me change the backdrop, etc) and the Claude Code session running in the cloud watched, fixed them and on my approval, pushed them live.

I've been making a lot of apps in various sessions which share the same repo. One of them https://www.orgiggly.com/david/aurora (an atmospheric musical loop generator) was plundered to generate a unique soundtrack for each rally (seeded by its name) - which is exactly how the orgiggly platform I built is supposed to work - each app created can make contributions to the next one.