AgainTheGame/timerText.cs

using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using UnityEngine;
using TMPro;
using UnityEngine.SceneManagement;

public class timerText : MonoBehaviour
{

  TextMeshProUGUI textBox;

  public float time = 0;
  protected float Timer;
  public int delayAmount = 1;

  void Start()
  {
    textBox = GetComponent<TextMeshProUGUI>();
    textBox.SetText("0");
  }

  void Update()
  {
    if (SceneManager.GetActiveScene().name == "game")
    {
      Timer += Time.deltaTime;

      if (Timer >= delayAmount)
      {
        Timer = 0f;
        time++;
        textBox.SetText("{0}s", time);
        PlayerPrefs.SetFloat("timeScore",time);
      }
    }
  }
}