Hi Mayshing, really sorry you got stuck. To move JB around you need to grab your leg control with a hand first. Then you can move around like in a conventional game. You can use either hand to grab it, but you need to keep holding the leg control to move.
This is great feedback though - I wonder how many other people have got stuck like this, I certainly need to add some helpers to explain the controls when this happens. I would love it, if you would give it another go if you have time. Thanks again for the nice comments and feedback.