sorry about that! the game was pretty broken when i first uploaded it, i just went through and fixed a few bugs so if you'd like to give it another shot feel free! if you do and you see that error coming up again just lmk and i'll take another look at it
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects...
It looks like toSorted only has "preview" browser support for firefox, whatever that means. I've opened this up again in chrome and it seems to run fine