I've done it! After literal months of work, I've finally finished my (rather long) blog post about how AES-GCM works and how it's security guarantees can be completely broken when a nonce is reused:
It includes more than 10 interactive widgets for you to try out AES-GCM, GHASH and the nonce reuse attack right in your browser! (Powered by #RustLang and #WASM )