How to make a (touch) gamepad only on the Y axis?

I find only examples for touch gamepads that use angle. Round pad.

I would only need the distance of the stick on the y axis to rotate the angle of a rectangle with physics behavior. Like this:

yes. Thank you!

I don't know if to create a pad zone where the stick can move (and use its coordinates)

or just use the canvas heigth.

its right to move a physic object without a physic force? (for example with a "set angle")

and it is touch pad not analog pad.

sorry for my english

Sorry, I may have misread your question.

See this demo I made:

dropbox.com/s/x4vauq2wzy4lk9w/ThumbstickVerticalWithPhysics.capx

Thank you! it's exatly what im searching!