Any errors in console (f12)?
This is repeating many times without stop. The number of lines with gets longer and longer with the repetitions. This is on Firefox.
Uncaught TypeError: can't access property "colorMode", this.game is null
drawHat <a href="https://html-classic.itch.zone/html/10113514-1365995/index.html:7">https://html-classic.itch.zone/html/10113514-1365995/index.html:7
</a> draw <a href="https://html-classic.itch.zone/html/10113514-1365995/index.html:7">https://html-classic.itch.zone/html/10113514-1365995/index.html:7
</a> draw <a href="https://html-classic.itch.zone/html/10113514-1365995/index.html:7">https://html-classic.itch.zone/html/10113514-1365995/index.html:7
</a> ui <a href="https://html-classic.itch.zone/html/10113514-1365995/index.html:7">https://html-classic.itch.zone/html/10113514-1365995/index.html:7
</a> ui <a href="https://html-classic.itch.zone/html/10113514-1365995/index.html:7">https://html-classic.itch.zone/html/10113514-1365995/index.html:7
</a> FrameRequestCallback* <a href="https://html-classic.itch.zone/html/10113514-1365995/index.html:7">https://html-classic.itch.zone/html/10113514-1365995/index.html:7
</a> <a href="https://html-classic.itch.zone/html/10113514-1365995/index.html:7">https://html-classic.itch.zone/html/10113514-1365995/index.html:7</a>
index.html:7:53153I tried it on Chrome and Brave - it works. I tried it in Firefox incognito and the game works there as well.
My guess is that it might be related to my personal save - not many players have the grail hat, so maybe that is why it is not reported.
If there is a way to extract the save and you will need it to debug this, let me know how I can help.