Wait, you're the author but someone else submitted it as "Show HN"? That's... not how it's supposed to work, but hey, at least you're in the thread.

Here's another room (pass is dontclickdispose):

https://niltalk.com/r/8L5MD

And it's gone.

Last messages were about how the Dispose button is conspicuous and easy to press by mistake.

My apologies for being so unobservant :)