C# Syntax help

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class GameState : MonoBehaviour {

    private bool gameStarted = false;
    [SerializeField]
    private Text gameStateText;
    [SerializeField]
    private GameObject player;
    [SerializeField]
    private BirdMovement birdMovement; 
    [SerializeField]
    private FollowCamera followCamera;
    private float restartDelay = 3f;
    private float restartTimer; 
    private PlayerMovement playerMovement;
    private PlayerHealth playerHealth;


    // Use this for initialization
    void Start () {
        Cursor.visible = false;

        playerMovement = player.GetComponent<PlayerMovement> ();
        playerHealth = player.GetComponent<playerHealth> ();

        // Prevent the player from moving at the start of the game
        playerMovement.enabled = false;

        // Prevent the bird from moving at the start of the game
        birdMovement.enabled = false;

        // Prevent the follow camera from moving to its game position
        followCamera.enabled = false;


    }

    // Update is called once per frame
    void Update () {
        // If the game has not started and the player presses the space bar...
        if (gameStated == false && Input.GetKeyUp (KeyCode.Space)) {

            // ...Start the game
            StartGame();

        }

        // If the player is no longer alive...
        if (playerHealth.alive == false) {

            // ...end the game...
            EndGame();

            // ...increment the timer to count up to restarting...
            restartTimer = restartTimer + Time.deltaTime;

            // ... and if it reaches the restart delay...
            if (restartTimer >= restartDelay) {

                // ...then reload the currently loaded level.
                Application.LoadLevel (Application.loadedLevel);


            }
        }
    }

    private void StartGame(); {

        // Set the game state
        gameStarted = true;

        // removing the start text
        gameStateText.color = Color.clear;

        // Allow the player the move
        playerMovement.enabled = true;

        // Allow the bird to move
        birdMovement.enabled = true;

        // Allow the camera to move
        cameraMovement.enabled = true;
    }

    private void EndGame(); {

        // Set the game state
        gameStarted = false;

        //Show the game over text
        gameStateText.color = Color.white;
        gameStateText.text = "Game Over!";

        // Remove the player from the game
        player.SetActive (false);


    }

}