The great way is making everything the most simple.
The core code less than 80 lines, for the simple we can use.
Asset contains two modes: mouse and touch.
When mouse mode meets multi-touch, joystick will make mistakes, well you can use it in editor or Windows.
When you publish project to mobile you should use touch mode.
Touch mode has been compatible with multi-touch, joystick will not make any mistakes.

Quick Start：
1、Drag JoystickCanvas.prefab into scene
2、Add your events to FixedUpdate of JoystickController.cs, there is code example of judging joystick's forward in FixedUpdate
A simple example is provided in the Demo, please refer to it

You can email(372792797@qq.com) me when anything dose not expect.
Thanks for using ！