Did you read the description at the link i sent you?
It is not possible to move via joystick, but when you are inside the options there are sliders to move.
You can configure a joystick to move playerheight, thought.
Send the programmer a message that you would like to have that feature (like moving foreward on buttonpress). Maybe he will add it.
But why doń‘t you play standing? Then the games adjust and you won‘t need this hack. Have you tried?