Wohooo finally, after working for hours and stumbling upon mouse position / layer scale trick for about one hour, my physics learning session is now officially over and you can see the results here:
vip.ocemi.com
For who wonders the text says:
"Each touch is flapping wings of the lone dragon,
In your hands blue is the destination."
(But the background is black so use the middle portions of the screen for movement)
All advice is welcome,