I want to keep coins and score after player`s death, and also to have high score

Questions & Answers
1

Please answer l need you, l am stuck at this topic for about 2 months, if you solve me this problem l can launch my first game, if u do not l dont know where to find answers anymore. Please l am looking forward for your responds.

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This is my script for coins 

public class Coin : MonoBehaviour
{
    public float speed;
    private void Update()
    {
        transform.Translate(Vector2.left * speed * Time.deltaTime);
    }

    private void OnTriggerEnter2D(Collider2D other)
    {
        if (other.gameObject.CompareTag("Marko"))
        {
            CoinText.coinAmount += 1;
            Destroy(gameObject);
        }
    }
}

And score Manager 

public class ScoreManager : MonoBehaviour
{
    public int score;
    public Text scoreDispaly;
    public const string PrefScore = "prefScore";
    private void Update()
    {
        scoreDispaly.text = score.ToString();
    }
    void OnTriggerEnter2D(Collider2D other) 
    {
        if (other.CompareTag("Obstacle")) {  

            score++;
            Debug.Log(score);
            
        }
    }
}
2

One way to do this is that you save it to PlayerPrefs before you die, and load it when you respawn.

int iScore = PlayerPrefs.GetInt("MyLastScore", 0);

PlayerPrefs.SetInt("MyLastScore", iScore);
PlayerPrefs.Save();

That’s for if you switch scenes after you die and come to life again.

Another way of keeping a value between scenes is to have a GameManager-script that you have on a singleton Do Not Destroy object. And set the score to a variable in that script during scene transitions and put it back to your score after. You can look it up.