Score resets after changing scenes?

Unity Engine
1

I’m trying to make a game where you have to pick up the jewels and avoid the enemies. Each time I go to the next level, the score and time resets. Please help.

public Text timerText;//Link to this variable by dragging your UI textbox on the variable
    public float timeLeft;//this is the variable that will hold how much time is left

    //Use this for initialization
    void Start () {
        rb2d = GetComponent<Rigidbody2D> (); //this is so we can adjust the component
        count = 0;
        moveSpeed = 0.05f;
        spriteRenderer = GetComponent<SpriteRenderer> ();
        CountText.text = "score: " + count;
        timeLeft = 0f;//set to 10 seconds
    }

    //Update is called once per frame
    void Update () {
        //take a small amount of time off the variable everytime we enter the fram
        timeLeft += Time.deltaTime;
        //display time left
        timerText.text = "Time: " + (Mathf.RoundToInt (timeLeft)) .ToString ();
}

void OnCollisionEnter2D(Collision2D other) {
        if (other.gameObject.CompareTag ("Jewel")) { //this object will disappear
            other.gameObject.SetActive (false);
            count = count + 1;
            CountText.text = "Score: " + count;

        }

        if (other.gameObject.CompareTag ("Timer")) {
            other.gameObject.SetActive (false); //this object will disappear
            timeLeft -= 5f;
            if (timeLeft <= 0f) {
                timeLeft = 0f;
            }
2

You either need to save values to PlayerPrefs and load them in the next scene, or call DontDestroyOnLoad(gameObject) on an object carrying the values that should be persistent.