← All Products Game

Cogsworth

Steampunk Sudoku with a Nixie-tube terminal interface, rank system, and survival mode. Installable as a PWA thanks to a Service Worker — offline-first caching from day one.

JavaScript CSS Animations LocalStorage PWA

What I Learned

This is where I first wrapped my head around offline-first caching. A Service Worker that pre-caches the app shell so Cogsworth works without a network connection.