Ubuntu – How to make a HTML5 app for Ubuntu Mobile

The Applications templates are not Ubuntu Touch templates, those are actually just Qt Creator templates, you can't use them for Ubuntu Apps.

When you make an Ubuntu HTML5 app you can use standard JavaScript mouse event handlers like onmousemove, onmouseover and onmouseout although right now those don't work very well. Ubuntu Touch is in rapid development though so keep an eye out for updates.

EDIT: Use touch event handlers as specified in the W3C Specification

You can't really quit a HTML5 app from the app itself. It's not really a problem since if you had a chance to play with other apps for Ubuntu Touch you might have noticed that none of them have an exit button. On Ubuntu the idea is that you just slide apps into the background.

If you want to make a C++ application with a HTML5 UI you should read the answer to this question.

What is the web server serving the apps? You can always put shell scripts in the /cgi-bin/ folder and invoke the URL.