Finished my OS. Built from scratch with HTML, CSS, and JavaScript. Has Notes (saves to localStorage), Calculator, Timer, Todo list, Ping Pong, and About. Added multiple windows that you can drag around. Clean high-contrast Nothing-style design. Typed everything myself.

Live: https://anshum2422.github.io/my-os/
GitHub: https://github.com/anshum2422/my-os