I have been trying to do this for a little while now. If I have two virtual joysticks, sometimes Construct will get the two fingers mixed up, resulting in the aiming joystick sometimes facing towards the wrong finger. I also tried using the drag and drop behavior to work around this, but it doesn't really work when the camera is moving because if my finger isn't moving and the camera is it will stop dragging.
Thank you so much for your help!
-Vincent