This (my) website uses Service Workers, a web service (duh) that can be used to store certain webpages (such as The Platformer) on your computer for offline use. The service worker file is cerebraldatabank_serviceworker.js
Your browser (unknown if compatible or not) compatible with Service Workers.
Note: Service Workers may not work in private browsing mode or if your browser is set to block history or offline website storage.
Note 2: The service worker for this website can be registered by visiting this page or the index.html page. The service worker is only enabled for the files listed in cerebraldatabank_serviceworker.js.