Upgrading from iPad 1 to iPad Air - restoring individual app data?
You can backup data from apps with a program such as PhoneView (Mac) or iFunBox (Mac &amp; Windows), and restore the data individually per app.


  Browse, manage and download most any data saved by App Store apps from your iPhone, iPad or iPod Touch. If you're looking for a quick way to download saved recordings, videos or images from your apps, this is it. Even transfer game high scores between devices. — PhoneView


Open the app in PhoneView or iFunBox, and copy the folders out, then copy them to your new device.