No worries. The voting ends on the 14th, so as long as it is fixed before then, it'll be fine.
Just fix it when you get back and then reply to this post to let me know you have an updated game ZIP ready.
You can update the art on the itch.io page whenever. However, itch won't let you update the game ZIP file during the voting period. So what we'll do is when you have the update ready, I'll temporarily dis-qualify the game from the jam, this should allow you to post your update and then I'll 're-qualify' it.
This is not the first time I've done something like this allow a late update to a Jam entry, so don't worry, we'll sort it out.
In the mean time, relax and enjoy your holiday!
