Move to the direction of movement, in a mechanic similar to Mario Galaxy...

Hello guys, I'm developing a game that uses the mechanics of planets similar to Mario Galaxy.

But I'm having trouble to set a character's face in his direction. I'm trying hundreds of ways, but they all reset values ​​of the X and Z axes, leaving the character in a plan, when in reality it is over a sphere (planet) and its Y axis is always recalculated.

Follow what I'm trying at the moment, for example, direct face-to-left:

     private void MovementUpdate () {
         var _hor = Input.GetAxis("Horizontal");
         var _ver = Input.GetAxis("Vertical");
 
         var _localUp = transform.worldToLocalMatrix.MultiplyVector(transform.up);
         var _localRight = transform.worldToLocalMatrix.MultiplyVector(transform.right);
         var _localForward = transform.worldToLocalMatrix.MultiplyVector(transform.forward);
 
         //Face to left
         if (_hor < 0) 
         {
             var _rotation = Quaternion.LookRotation(-_localRight, _localUp).eulerAngles;
             transform.rotation.SetLookRotation(_rotation);
 
             transform.Translate(_localForward * Speed * Time.deltaTime, Space.Self);
         }
      }

Any help is very welcome, and sorry for my english...