Script de Player Prefab (Infinite Jumper)

using UnityEngine;
using System.Collections;

public class J_PlayerController_Jumping : MonoBehaviour {

    [SerializeField]
    float moveSpd;

    [SerializeField]
    float jumpPower;

    Rigidbody2D myRigidbody2d;
    SpriteRenderer mySpriteRenderer;

    void Awake(){

        myRigidbody2d = GetComponent<Rigidbody2D> ();
        mySpriteRenderer = GetComponent<SpriteRenderer> ();


    }

    void Update(){

        FlipCharacter ();



    }


    void FixUpdate () {

        Movement ();


    }

    void OnCollisionEnter2D(Collision2D col) {

        myRigidbody2d.velocity = new Vector2 (myRigidbody2d.velocity.x, 0f);
        myRigidbody2d.AddForce (Vector2.up * jumpPower);

    }

    void Movement(){

        myRigidbody2d.AddForce (Vector2.right * Input.GetAxis ("Horizontal") * moveSpd);

    }

    void FlipCharacter(){

        if (Input.GetAxisRaw ("Horizontal") < 0)
            mySpriteRenderer.flipX = true;
        else if (Input.GetAxisRaw ("Horizontal") > 0)
            mySpriteRenderer.flipX = false;

    }

}