Added a Joystick for touchscreen players :D

The first version was only playable when connected to a keyboard. Boring for touchscreen users, so I added a joystick! Thanks for the people in this forum thread who made it very easy to add: https://godotengine.org/qa/28644/how-to-create-a-onscreen-joystick-for-touchscre...

https://godotengine.org/asset-library/asset/714