Hey, can't start the game through the itchio launcher, so I played it with Chrome instead.
If you want to fix it the bug, here is the error code :
Unable to parse Build/Zoteboat v2.5.framework.js.br! This can happen if build compression was enabled but web server hosting the content was misconfigured to not serve the file with HTTP Response Header "Content-Encoding: br" present. Check browser Console and Devtools Network tab to debug.
And in this thread they seem to give out an easy fix :
https://discussions.unity.com/t/solved-webgl-build-error-unable-to-parse-build-f...