Squishy's Multiplayer Platformer

Almost certainly against the guidelines.

"To ensure that the webpages you create on Khan Academy will continue working in the future, they should not use functionalities intentionally disabled for reasons of security, privacy, or user experience.

LocalStorage: Webpages should not store large amounts of data in localStorage or intentionally use the same keys as other programs.
Sound: Webpages should only create sounds using the files available to ProcessingJS programs or the Web Audio API oscillator. Webpages should also only play sounds in response to user interaction. Webpages should not play sounds immediately upon load."

While KA Guardians definitely don’t like this user’s multiplayer, it’s not against the guidelines in the slightest. It does use a browser bug, but it doesn’t use any Khan Academy bugs.

Did Squishy delete all of his programs? I can't find some of them

Hypercube, he did. I don't know why, he did it suddenly.

Actually, he didn't delete any of his programs. The guardians went and hid all of them from public view. You can still fetch his programs using the API.

As for is multiplayer games against the guidelines? Technically no, but I am sure the guardians definitely don't like it.

Yeah, I just tried it and it didn't load for me.

Don't know what happened.

Could someone tell me what happened please?

Certainly against the guidelines. They ban all creative things such as this. For another example, they removed Khancast, a service for playing computer words.