Note(30 December 2013) Please note for the time being a new CAPX and test page links in the back are updated. Prior comments of the tutorial not working were ma...
I made a simpler version for C3 using only a few lines. You can also touch the joystick everywhere, just like in this example. It also only requires event blocks. Check out my post here: construct.net/en/forum/construct-3/your-construct-creations-9/virtual-joystick-touch-mobile-173339