As you know (or may not have), all of the games present on these websites are hosted with Cloudflare, which is a free website hosting service. The main way to get your website up and running is to use "Workers", which are now unfortunately blocked. This means that I had to make the switch to Pages, which is like a much less advanced version of Workers.
This wouldn't usually be an issue. However, the way Pages works for multiplayer games is that they send a call to the Worker, which essentially does all of the background server managing and multiplayer shenanigans via a program named Wrangler. However, since Workers are now blocked, the Wi-Fi makes it so once the Page calls the Worker, the Worker cannot call the Wrangler because the Wrangler is hosted on an external server elsewhere in the world.
So far, the only presented fix is to use another internet, such as a hotspot, or play the games at home, or someplace else.
Browser -> Pages *.pages.dev static site, the game itself -> Worker *.workers.dev API + multiplayer back end [BLOCKED] -> Wrangler external server (per the dev) [unreachable]
*.workers.dev. The Page loads fine, but its calls to the Worker never complete, so the Worker can never reach its own external server.royio.skewezcoolness.workers.dev, pocket-metropolis.skewezcoolness.workers.devworkers.dev.Thank you for stopping by. This site has now served 4.4 thousand web requests in total.
Some games are getting blocked. Pocket Metropolis CLASSIC, Pocket Metropolis Remastered and royIO are the ones affected at the time of writing this.
A filtering system called localurlfilter is slowly blocking these websites on certain networks (mostly school and managed Wi-Fi). It doesn't take them all down at once. It works through them gradually, so a game that loads today can fail tomorrow, and one that fails on one network can still work on another.
These three are hit first because they rely on live multiplayer connections, which filters like this flag most easily. When a game's connection is cut, it usually just sits on a loading screen or says it can't connect.
There is an active effort working against this. I'm trying out fixes that get the games back on blocked networks, and testing different hosting setups so the games are harder to filter out. This takes time because every change has to be tested on a network that actually blocks them, and the filter keeps changing.
Try a different connection, like a phone hotspot or home Wi-Fi, since the block depends on the network, not the game. And there are plenty of other games on this site that aren't affected. Cardinal Till You Gibbon, MODULO, Tarena, Orbit Mage, Item Factory 2: Redux, Redemption 3 and Sandbox: Redusted should all work normally.
TL;DR: a filter is slowly blocking three games, I'm working on it, and the rest of the site is fine. Go play something else for now.