Sorry you haven't got a reply have you tried learning about the physics joint? I believe what you are trying to accomplish can be done either with physics joints and physics behavior or pin behavior and platform controls but either way you will have to intervene with the movement. I think simply getting your character to grip the walls will be more complex then getting copies of your character to follow. You will only need to create a on and off switch situation for when you collide with the side of an object rather than on top that takes gravity away, then checking overlapping at an offset you can test if the character one fraction up or down would stop colliding withobject and have character stop there and make them let go of button and press again to purposely fall or whether to perform a quick hop up at the top of a clinging climb.