Yeah, unfortuantly I can only build for 8.1 since I need Windows 8.1 Pro for the Emulators (Not sure why) or else I'd have to pay about $500 just for the non express visual studio in order to do this. While I'd love to have a better version of Visual Studio, that's a bit out of my price range for an app that I'm not making any money on because I don't want to annoy people by putting ads in the app. I'm glad to hear that other devices should be getting the update soon.
Awesome, glad to hear it is working. The main things I'm worried about are the saved data after turning the phone off and on again as well as the links to the FAQ and Websites (just want to make sure they work since I'm new to using WinJS rather than just javascript & jquery). I wish I had some kind of control over the back button and I'll see if there is a way to get that going, but from what people are saying, it is just a limitation of the OS and not something an app can handle (Will try to fix it though). As I've said for the button sizes, I'm definitly going to increase the size. They seemed good to me when I was developing, but if this many people are having issues, then it has to change.