GameState Script Problem

Hi, i'm just a newbie who develop a 2d infinite runner game. i was following a tutorial and remade with my own asset. I got a problem when make the GameState script. here the script

 using UnityEngine;
 using System.Collections;
 
 public class charController : MonoBehaviour {
     
     Animator anim;
     
     public Vector2 jumpForce = new Vector2 (0,300);
     
     public Transform groundCheck;
     
     bool grounded = false;
     
     float groundRadius = 0.2f;
     
     public LayerMask whatIsGround;
     
     public Collider2D JumpButton;
 
     // Use this for initialization
     void Start () 
     {
         anim = GetComponent<Animator> ();
     }
     
     void Update () 
     {
         //handle back key in Windows Phone
         if (Input.GetKeyDown(KeyCode.Escape))
             Application.Quit();
         
         if (GameStateManager.State == State.Intro) 
         {
             if (WasTouchedOrClicked())
             {
                 GameStateManager.State = State.Play;
             }
         }
         
         if ((grounded) && WasTouchedOrClicked() && GameStateManager.State == State.Play)
         {
             Vector2 contactPoint = Vector2.zero;
             
             if (Input.touchCount > 0)
                 contactPoint = Input.touches[0].position;
             if (Input.GetMouseButtonDown(0))
                 contactPoint = Input.mousePosition;
             
             if (JumpButton == Physics2D.OverlapPoint(Camera.main.ScreenToWorldPoint(contactPoint)))
             {
                 rigidbody2D.velocity = Vector2.zero;
                 rigidbody2D.AddForce(jumpForce);
                 anim.SetBool ("Ground", false);
             }
         }
     }
     
     void FixedUpdate()
     {
         grounded = Physics2D.OverlapCircle (groundCheck.position, groundRadius, whatIsGround);
         anim.SetBool ("Ground", grounded);
         anim.SetFloat ("vSpeed", rigidbody2D.velocity.y);
     }
     
     void OnTriggerEnter2D(Collider2D col)
     {
         if (col.gameObject.tag == "Obstacle")
         {
             GameStateManager.State = State.Dead;
             deadMoves();
         }
     }
     
     bool WasTouchedOrClicked()
     {
         if (Input.GetButtonUp("Jump") || Input.GetMouseButtonDown(0) || 
             (Input.touchCount > 0 && Input.touches[0].phase == TouchPhase.Ended))
             return true;
         else
             return false;
     }
     
     void deadMoves()
     {
         anim.SetBool ("dead", true);
     }
 }

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 
 public enum State
 {
     Intro,
     Play,
     Dead
 }
 
 public static class GameStateManager
 {
     public static State State { get; set; }
 
     static GameStateManager ()
     {
         State = State.Intro;
     }
 }

 using UnityEngine;
 using System.Collections;
 
 public class obstacleSpawner : MonoBehaviour 
 {
     // a public object array for which objects to spawn
     public GameObject[] obj;
     //min and max times for another spawn
     public float spawn = 2f;
     
     void Start () {
         //start spawn 
         Spawn();
     }
     
     void Spawn()
     { 
         if (GameStateManager.State == State.Play) 
         {
             //get random number 
             float rand = Random.Range (1, 4);
             if (rand > 2 && rand < 4) 
             {
                 Instantiate (obj [Random.Range (0, obj.GetLength (0))], transform.position, Quaternion.identity);
             }    
             //invoke spawn at random time interval between min and max
             Invoke ("Spawn", Random.Range (2, 2));
         }
     }
 }

The problem is the obstacle didn't spawn, but the character can die. please help me and explain it. thank you