Go ahead and give the Mac version a try, if you don't mind. I'll see if I can get my hands on a Windows environment soon..
Works on Mac! If I input it incorrectly, it still does the grey screen thing, but when done correctly it will download and let me play. I triple checked on Windows, but no matter what I seem to get a grey screen.
Into the Hive felt more controlled. I still found myself getting lost and not knowing where to go. I wonder if fog of war on the maps, only revealing as I go would help.