NikolayS/PGSimCity ? reverse-engineered prompt

Build me a static web app called PGSimCity, an explorable 3D city that helps people understand how PostgreSQL actually works.

I want the city to feel like a live interactive model of Postgres, where each district represents a real database mechanism, like shared buffers, WAL, storage, backends, checkpoints, autovacuum, and standby replication. The user should be able to move around the scene, zoom, orbit, walk in first person, click buildings to inspect them, and jump between districts with keyboard shortcuts. There should also be a guided tour, a command palette, floating labels, and clear on screen explanations for what each part means.

Make it a single browser app with no server or database, just a fast static experience that runs locally and can be built for deployment. Use the existing screenshots and documentation style as a guide, and keep the visuals colorful and easy to read. If you need current implementation details, look up the latest docs online first.