ControlJugador

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ControlJugador : MonoBehaviour {

    private Rigidbody rb;
    public float velocidad;
    public GameObject referencia;

    void Start () {
        rb = GetComponent<Rigidbody> ();
    }

    void FixedUpdate () {
        float horizontal = Input.GetAxis ("Horizontal");
        float vertical = Input.GetAxis ("Vertical");

        rb.AddForce (vertical * referencia.transform.forward * velocidad);
        rb.AddForce (horizontal * referencia.transform.right * velocidad);
    }
}