Regex visualized as 3D marble run

My coworker used to teach non-technical people how to code. Students always found regex hard to understand.

Let's be honest, regex can be hard to understand even for technical people. (At least it's hard for me.)

So coworker built this to help anyone understand arbitrary regex commands.

AI disclosure: this was built using Agent Duel, a local coding agent arena system (https://github.com/bottomless/agent-duel). Promotion disclosure: our company is building agent duel. To test it and find bugs we are building passion projects through the system. I nonetheless thought HN would find this interesting.

This is actually pretty satisfying, I wish it had sound. Maybe a dramatic follow cam for the balls

Seems the input text box is limited to 301 characters.

Now I have 3 problems

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