For that past little while our XCode exporter has been broken. It was just fixed, and the emails are automatically going out from before.
So you must have selected "Export For The App Store" in the project menu some time in the past little while.
You must be running the latest version of XCode, if you are having issues with that part of it I suggest searching XCode documentation.
We do have some documentation on exporting: some of it is out of date (due to apple changes), but for the most part it still applies or may require some slight adjustments.
https://hyperpad.zendesk.com/hc/en-us/categories/200163049-Publishing
As for wanting an app that can be played immediately on any device, easiest way is to just run it within hyperPad/ use the viewer app.
This XCode project is for submitting to the Apple App store.