using UnityEngine;
using System.Collections;

//Change #yourScriptName and write your Script Name...
public class #yourScriptName : MonoBehaviour {

public KeyCode ChooseRightButton;

public KeyCode ChooseLeftButton;

public float speed;

private Rigidbody2D rb2d;

void Start()

{ rb2d = GetComponent<Rigidbody2D> (); }

void FixedUpdate()

{ if(Input.GetKey(ChooseRightButton)){ rb2d.velocity = new Vector2(speed, rb2d.velocity.y); }

else if(Input.GetKey(ChooseLeftButton)){ rb2d.velocity = new Vector2(-speed, rb2d.velocity.y); }

else{ rb2d.velocity = new Vector2(0, rb2d.velocity.y); } } }