Browser version isn't working for me, I believe you need to turn on the SharedArrayBuffer support here in itch's game settings.
That's weird, for me it's working perfectly on itch.io, what browser do you use?
I'm using Chrome on Windows 10.
Try it on Edge or Opera, maybe works. (I really don't know what can be happening, I'll see with my friend)
It works on Edge, so I guess it's only a Chrome issue then.
Nice, I'm happy that worked ^^