Hey hey, yes you are right, we had 5 minutes to get the whole thing submitted to the jam. So we did not know how to properly export a GODOT game. Only after the submission did we found out about it missing the .exe.
Probably, it'd be ok to upload a new version? I guess it counts as "game breaking issue" and it'd be fine to update the build (probably you can ask admins in discord).
From the Jam description we concluded that the 'grace' period for gamebreaking bugs was 1 hour after the jam concluded, we could have another look at it.