So ive heard of a bug that blocks half the screen, i only saw it on opera browsers at first but I've been informed that it can happen on chrome too. i think i know what causes it, so I'm gonna try and do a quick build to fix that and a few other minor things in the next few days probably.
Edit: apparently people are still getting the bug, idk what causes it since I've never had an issue, so just download the itch build
if you are still having trouble playing, just get the itch.io build https://solfrossty.itch.io/five-nights-at-fulps