touch move slide object

hello.

I have the x-axis of a 3D object, but I want to go

See video of "metal storm aces", similar to the plane of the selection

Objects in the script and load only the x-coordinate of the object move.

Touch the screen to the left, to the right a particular x-value, or would like to move one space.

Please Help.

Sorry because poor English. Please understand.

my c# code

 float speed = 0.2f;
  
 void Update () 
 {

     if (Input.touchCount > 0 &&  Input.GetTouch(0).phase == TouchPhase.Moved) 
     {
         Vector2 touchDeltaPosition = Input.GetTouch(0).deltaPosition;
         transform.Translate (touchDeltaPosition.x * speed, 0, 0);
     }

}

See video link

link text