Coding a left/right object movement C# script for android phones in unity

Here we are just one script, assign it to the cube TargetSlideControl.cs

using UnityEngine;
using System.Collections;

public class TargetSlideControl : MonoBehaviour {

public int SPEED = 1;
public Transform leftTrigger;
public Transform rightTrigger;

// Use this for initialization
void Start () {

}

// Update is called once per frame
void Update () {
    // If Mobile
    if(Application.platform == RuntimePlatform.Android || Application.platform == RuntimePlatform.IPhonePlayer){
         if(Input.touchCount > 0) {
           checkTouch(Input.GetTouch(0).position);
         }
     }else if(Application.platform == RuntimePlatform.WindowsEditor){ // Else if Desktop
         if(Input.GetMouseButton(0)) {
           checkTouch(Input.mousePosition);
         }
     }
}

private void checkTouch( Vector2 pos ) {
    Ray ray = Camera.main.ScreenPointToRay( pos );
    RaycastHit hit;
    if(Physics.Raycast(ray, out hit)){
        if(hit.collider.transform  == leftTrigger) {
            SlideLeft();
        } else if(hit.collider.transform  == rightTrigger){
            SlideRight();
        }
    }
 }

// Call Translate on this transform passing SPEED * Direction * deltaTime

public void SlideLeft() {       
    this.transform.Translate( SPEED * Vector3.left * Time.deltaTime, Space.World );
}

public void SlideRight() {
    this.transform.Translate( SPEED * Vector3.right * Time.deltaTime, Space.World );
}
}

Assign the spheres in the editor to the TargetSlideControl script:

ENJOY!