You could send a PR. It's reasonably straightforward to add a manifest to make the app installable (https://developer.mozilla.org/en-US/docs/Web/Progressive_web...), and to use Workbox to make it work offline since it's fully static (https://developer.chrome.com/docs/workbox).

The one caveat is that a PWA needs an icon but the project doesn't currently have one, so you'd have to design, find, or LLM-generate one.

You have to use "Add to home" menu item on Firefox for Android. But this web app doesn't seem to be a PWA.

iPhone 13. Did you change the slider at the bottom?

Alternatively, you could have downloaded an existing one. What you did is just a roundabout way of acquiring one of the many WASM Rust GB emulators in the training set. Except it probably now has several problems from reconstruction. You didn't learn anything new from the process. It's just wasteful in several ways.

Likely because all of the external docs were already in its training set.

Yes, this project was made in around 15 hours of Codex.