That’s what Microsoft say now about the re-submission I made last Sunday:
Thank you for your reply. We sincerely apologize for any confusion the last email may have caused. At this time, we are able to confirm that your “Survivalcraft” app, version 1.11, is in the “PendingCertification” status; this likely means that your submission has successfully entered the testing queue. We ask that you please allow four business days for this app to complete testing from today.
High time for it to hit the marketplace. Can wait to get the feedback on fire and explosions. And don’t forget you can swim in magma now, real fun and you get a nice orange screen when you dip your head under (had to do it like that because, unlike water, magma is non-transparent, so looking under the surface would reveal underground world).