The developers have automated a system where the underlying game files remain on a static server, but the Google Sites front-end URL changes every 2–3 weeks. The moment a URL is flagged, a new "fixed" one is deployed. Community hubs (Discord, Reddit, GitHub) share the new link.
Searching blindly will lead you to scam sites. Follow these exact steps to get to the legitimate fixed Google Sites version.
Because these links change often to avoid being blocked, you can't always rely on a saved bookmark. Here is the best way to find the fixed version: