koobas.hobune.stream
i've got an error with the roll a ball tutorial
the error is: NullReferenceException: Object reference not set to an instance of an object PlayerController.FixedUpdate () (at Assets/scripts/PlayerController.cs:20)
and this is my script: 
The gameobject that this script is attached to needs to have a rigidbody component attached as well. It looks like you may have forgotten to add a rigidbody to the object?
