Yesterday, about an hour or two after the incident began, my kids and I were able to get into a Roblox instance with some unusual processes. (Logging into an account wouldn't work and some other website functionality was screwy, but if you were still logged in, you could do some things to get into some Roblox instances.)

A couple hours later, when trying to play Roblox again, our tricks no longer worked and we eventually gave up. But at least at the start, some could still play.