Maybe get a good night's sleep, and try again tomorrow. You only have to fix your screenshots, right? You're so close.
What is the fix? How do you know the developer is "so close"?
I'd wager that most of Microsoft's app approval team is away the week between Christmas and New Years. If the submission was routed to someone overseas where Christmas isn't as big a deal (so they weren't on vacation), that would explain the miscommunication. I would just resubmit now that presumably everyone is back from vacation.
Apple closes the App Store to new submissions over the holidays. At least Microsoft was open.
I'd be interested in seeing a screenshot of the main menu to see the 3 choices he mentions.
What the heck kind of review process plays all the way through a game? What if you had a 100 hours of content or secret rooms?
If it was routed to someone overseas and they have lesser abilities to communicate with developers, then Microsoft should have just closed submissions for the holidays instead of causing frustration.
Knowing now that there are ads on the page, I don't think they devalue the post unless they are particularly invasive or offensive.