Junior programmer pathway

Hi guys,
I am currently doing the Unit 1 player control path on the Junior programmer pathway. I’ve reached an issue where my vehicle flies in the air when I switch to game mode, despite the code being exact in the video? Any help would be appreciated.

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

public class PlayerController : MonoBehaviour
    public float speed = 5.0f;
    public float turnSpeed;
    public float horizontalInput;
    public float forwardInput;

    // Start is called before the first frame update
    void Start()


    // Update is called once per frame
    void Update()
         horizontalInput = Input.GetAxis("Horizontal");
        forwardInput = Input.GetAxis("Vertical");

    //Moves vehicle forward
        transform.Translate(Vector3.forward* Time.deltaTime* speed * forwardInput);
        transform.Rotate(Vector3.up, Time.deltaTime * turnSpeed * horizontalInput);

Check if you accidently added rigidbody gravity component to your main camera gameobject in the inspector. @justinev2725