Controle de temporizador, movimentos do player, posição aleatória da esfera no labirinto,colisão com esfera e ações da tela de resultado da partida Unity

GameManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class GameManager : MonoBehaviour
{
    [SerializeField] private float startTime = 30.0f;
    private float timer;
    private int timerSec;

    [SerializeField] private Text timerText;
    [SerializeField] private GameObject loseWindow;

    void Start()
    {
        timer = startTime;
    }

    void Update()
    {
        if (timer > 0)
        {
            Timer();
        }
        else
        {
            FinishGame();
        }
    }

    void FinishGame()
    {
        loseWindow.SetActive(true);
        Time.timeScale = 0;
    }

    void Timer()
    {
        timer -= Time.deltaTime;
        timerSec = (int) timer;
        timerText.text = timerSec.ToString();
    }

    public void Restart()
    {
        Time.timeScale = 1;
        timer = startTime;
        SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
    }

    public void Exit()
    {
        Debug.Log("Exiting...");
        Application.Quit();
    }
}

PlayerMove.cs

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

public class PlayerMove : MonoBehaviour
{
    [SerializeField] private float speed = 10.0f;
    [SerializeField] private float rotationSpeed = 100.0f;
    [SerializeField] private GameObject winnerWindow;
    [SerializeField] private GameObject targetPrefab;

    void Start()
    {
        Instantiate(targetPrefab, GetRandomPosition(), Quaternion.identity);
    }

    void Update()
    {
        float translation = Input.GetAxis("Vertical") * speed;
        float rotation = Input.GetAxis("Horizontal") * rotationSpeed;

        translation *= Time.deltaTime;
        rotation *= Time.deltaTime;

        transform.Translate(0, 0, translation);
        transform.Rotate(0, rotation, 0);
    }

    private void OnTriggerEnter(Collider collision)
    {
        Destroy(collision.transform.parent.gameObject);
        FinishGame();
    }

    void FinishGame()
    {
        winnerWindow.SetActive(true);
        Time.timeScale = 0;
    }

    Vector3 GetRandomPosition()
    {
        Vector3[] positions = {new Vector3(-1.7f, 1.2f, -2.56f),
            new Vector3(17.26f, 1.12f, -5.39f),
            new Vector3(16.93f, 1.12f, 9.61f),
            new Vector3(16.93f, 1.12f, 17.91f),
            new Vector3(6.88f, 1.12f, 12.74f),
            new Vector3(1.85f, 1.12f, -0.2f)};
        int randomNumber = Random.Range(0, positions.Length);
        return positions[randomNumber];
    }
}