I don't definitively know what caused it, but I did notify my local Apple dev relations team while it was pending review.

any tips on how to get in touch with the Apple dev relations team? We generally send emails to app_store_promotion@apple.com around launches, but they don't seem to get any response.

Go to WWDC if you can and there's a range of people you can meet. I'm not even sure if my emails had any effect

I do plan on going next year. I decided to skip this year as I was not sure how valuable it will be, but now I feel I was wrong about that. Good luck with continued success for this and future games.

Definitely go if you can. I went in 2013. I wish somebody told me ahead of time how important / valuable the one-on-one sessions with Apple engineers are though.

I realised though only during Day 3 and barely had any time with them. The sessions are a small part of the week (I mean, you can watch those online at any time).