我有无尽的亚军游戏，但我不知道如何使我的玩家在移动中移动

Question

我有无尽的跑步游戏，我可以使用键盘键左右移动播放器，但我不知道如何在移动设备中左右移动播放器？请任何人给我一个脚本让我的播放器在移动设备上左右移动...

这是我的脚本

using UnityEngine;

public class PlayerMovement : MonoBehaviour {

    // This is a reference to the Rigidbody component called "rb"
    public Rigidbody rb;

    public float forwardForce = 3000f;  // Variable that determines the forward force
    public float sidewaysForce = 43f;
    // Variable that determines the sideways force

    // We marked this as "Fixed"Update because we
    // are using it to mess with physics

    void FixedUpdate ()
    {
        // Add a forward force
        rb.AddForce(0, 0, forwardForce * Time.deltaTime);

        if (Input.GetKey("k"))  // If the player is pressing the "d" key
        {
            // Add a force to the right
            rb.AddForce(sidewaysForce * Time.deltaTime, 0, 0);
        }

        if (Input.GetKey("d"))  // If the player is pressing the "a" key
        {
            // Add a force to the left
            rb.AddForce(-sidewaysForce * Time.deltaTime, 0, 0);
        }

        if (rb.position.y < -1f)
        {
            FindObjectOfType<GameManager>().EndGame();
        }


    }
}