player1.cs

using UnityEngine;
using System.Collections;
using UnityStandardAssets.CrossPlatformInput;


public class player1 : MonoBehaviour
{
   public float playerboundar = 1f;
   Rigidbody2D mybody1;
   public float moveforce = 1f; //force to push the player1 (mybody1)
    
    // Player (Character right)
    void Start()
    {
     mybody1 = this.GetComponent<Rigidbody2D>();
    }

    void FixedUpdate()
    {
        Vector3 pos = transform.position; 
        Vector3 moveplayer1 = new Vector3(CrossPlatformInputManager.GetAxis("Horizontal"),0,0) * moveforce * Time.deltaTime; // taking input from controller 
        pos += moveplayer1;  
        mybody1.AddForce(moveplayer1); // moving the player 

        // Setting the border limits for movement 
        float screenRatio = (float) Screen.width / (float) Screen.height;
        float widthOrtho = Camera.main.orthographicSize * screenRatio;
        
        if(pos.x + playerboundar > widthOrtho)
        {
            pos.x = widthOrtho - playerboundar; 
        }
        if (pos.x - playerboundar < - widthOrtho)
        {
            pos.x = - widthOrtho + playerboundar;
        }

        transform.position = pos;
    }

  


    }