Unity player facing wrong way

Question

I'm very new to unity and have followed a brackeys tutorial to get this. My movement script works, but the player is always facing the wrong direction, and I am unable to change this. I've made an empty gameobject, parented the model to it and put the script into it, but it still won't rotate.

Movement script:

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

[RequireComponent(typeof(Rigidbody))]
public class MovementSystem : MonoBehaviour
{

    private CharacterController controller;
    public float positiveZForce = 200f;

    public float negativeZForce = 175f;
    public float xForce = 175f;

    public float yForce = 125f;

    Rigidbody rb;
    public bool isGrounded;

    void Start() {
        rb = GetComponent<Rigidbody>();
    }
    void OnCollisionEnter(Collision other) {
        if (other.gameObject.CompareTag("Ground")) {
            isGrounded = true;
        }
    }
    void FixedUpdate()
    {
        if (Input.GetKey("w")) {
            rb.AddForce(0, 0, positiveZForce * Time.deltaTime);
        }

        if (Input.GetKey("s")) {
            rb.AddForce(0, 0, -negativeZForce * Time.deltaTime);
        }

        if (Input.GetKey("a")) {
            rb.AddForce(-xForce * Time.deltaTime, 0, 0);
        }

        if (Input.GetKey("d")) {
            rb.AddForce(xForce * Time.deltaTime, 0, 0);
        }

        if (Input.GetKey("space")) {
            if (isGrounded) {
                rb.AddForce(0, yForce, 0);
                isGrounded = false;
            }
        }
    }
}

Answer 1

The most direct solution would be to call

transform.LookAt(transform.position + rb.velocity);

in your FixedUpdate function. This will cause your gameObject to rotate to face in the direction of its motion.