Apparently there's an error caused by the main menu picture for some people. I think I fixed it, but I can't upload the fix.

I hate that it sends an error immediately upon opening.

You can upload another build to the game’s page and set the old one to hidden, no?

It says I can upload again after the game jam is over. Ah well, it's the most minor of minor bugs.

Uploading fixes is disabled during voting to prevent people from uploading a "fix" that completely changes their game. Basically, it's to prevent people from cheating. You can upload the fix after the jam is over. :)