hi! i'm honestly not sure where this problem originates, since the only thing i've edited before this problem started coming up was adding the art to the start screen, but it seems like you can "get past" the start screen before the problem really appears.
besides zooming out (maybe try ctrl +/-? i'm not sure how to zoom out on a downloaded game either)have you checked if your cookies are disabled? otherwise it might be better to try on mobile or playing right in your browser instead of a download.
hopefully, i'll be able to fix this in a next version of the game, but right now that's unfortunately all the help i can offer 😔