When I first open the page, an error alert pops up. I can't copy it, so here's my best transcription:
Apologies! A fatal error has occurred. Aborting.
Error: Uncaught SecurityError: Failed to read the 'localStorage' property from 'Window': Access is denied for this document.
It shows a stack trace which mentions a "talk.itch.zone" URL. Based on a quick look at the source, the error is caused by an iframe attempting to access localStorage.
This wouldn't be a problem if the game worked. It definitely works on one of the other online links.