It's literally just a white screen but there's a period hidden about halfway down with a hyperlink attached to it. The who thing turns out to be an internet joke. I found it back when I was bored and still in school
Back in my school when we were bored we'd play CityState. It's kind of like Sim City, but since there's a slight educational twist to it, so our school didn't block it. Fun times!
Lucky I was stuck with 2048 or shapes.io because for what ever reason they couldn't figure out how to block most of the .io stuff without Google telling the IT people to fuck off?. They would block a game like that then Google classroom and everything on YouTube would be blocked.