Why my functions can't talk to each other !! WTF

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

public class Player : MonoBehaviour
{

    private Animator m_animator;
    private Rigidbody2D m_rigidbody2D;
    private bool m_isMoving;
    private Vector2 m_velocity;
    private float m_curSpeed = 10.0f;
    private float m_angle;
    private int clicFunction2; //0 pas de fonction, 1 fonction selectionnée, 2 Click de souris pour envoyer la bullet
    private bool m_boost;
    private float m_durationBoost;
    private Manager m_managerScript;

    public Texture2D m_cursorTexture;

    private Vector3 mousePos;

    private GameObject Button_Function_02;
    public GameObject TitTat;
    public GameObject MoleculeInstable;

    public float countdownFunction01;
    public float countdownFunction02;
    public float countdownFunction03;
    public float countdownFunction04;
    public float countdownFunction05;
    public float countdownFunction06;


    void Start ()
    {
        countdownFunction01 = 0;
        countdownFunction02 = 0;
        countdownFunction03 = 0;
        countdownFunction04 = 0;
        countdownFunction05 = 0;
        countdownFunction06 = 0;

        Button_Function_02 = GameObject.Find("Button_Function_02");
        m_animator = GetComponent<Animator>();
        m_rigidbody2D = GetComponent<Rigidbody2D>();
        m_isMoving = false;
        m_velocity = new Vector2(0, 0);
        clicFunction2 = 0;
        m_boost = false;
        m_managerScript = GameObject.Find("_manager").GetComponent<Manager>();
        m_durationBoost = 5.0f;
    }

    void Update ()
    {

        if (countdownFunction01 >= 0)
            countdownFunction01 -= Time.deltaTime;
        if (countdownFunction02 >= 0)
            countdownFunction02 -= Time.deltaTime;
        if (countdownFunction03 >= 0)
            countdownFunction03 -= Time.deltaTime;
        if (countdownFunction04 >= 0)
            countdownFunction04 -= Time.deltaTime;
        if (countdownFunction05 >= 0)
            countdownFunction05 -= Time.deltaTime;
        if (countdownFunction06 >= 0)
            countdownFunction06 -= Time.deltaTime;


        if (clicFunction2 == 0)
            Button_Function_02.GetComponent<Button>().image.color = Color.white;
        if (clicFunction2 == 1)
        {
            Button_Function_02.GetComponent<Button>().image.color = Color.red;
            Cursor.SetCursor(m_cursorTexture, Vector2.zero, CursorMode.Auto);
        }
        if (clicFunction2 == 2)
        {
            Instantiate(MoleculeInstable, transform.position, transform.rotation);
            clicFunction2 = 0;
            Cursor.SetCursor(null, Vector2.zero, CursorMode.Auto);
        }

        if (Input.GetMouseButtonDown(0))
        {
            if (clicFunction2 == 1)
            {
                clicFunction2 = 2;
                countdownFunction02 = 6;
            }
        }

        if (m_boost)
            m_durationBoost -= Time.deltaTime;
            m_curSpeed = 20.0f;
        if (!m_boost)
            m_curSpeed = 10.0f;
        if (m_durationBoost <= 0)
        {
            m_boost = false;
            m_durationBoost = 5.0f;
        }

        m_velocity = new Vector2(0, 0);

        //INPUTS
        if (Input.GetKey(KeyCode.UpArrow) || Input.GetKey(KeyCode.Z)|| Input.GetKey(KeyCode.W))
        {
            Vector2 velUp = new Vector2();
            velUp.y = 1;
            m_velocity += velUp;
        }
        else if (Input.GetKey(KeyCode.DownArrow) || Input.GetKey(KeyCode.S))
        {
            Vector2 velDown = new Vector2();
            velDown.y = -1;
            m_velocity += velDown;
        }

        if (Input.GetKey(KeyCode.LeftArrow) || Input.GetKey(KeyCode.Q) || Input.GetKey(KeyCode.A))
        {
            Vector2 velLeft = new Vector2();
            velLeft.x = -1;
            m_velocity += velLeft;
        }
        else if (Input.GetKey(KeyCode.RightArrow) || Input.GetKey(KeyCode.D))
        {
            Vector2 velRight = new Vector2();
            velRight.x = 1;
            m_velocity += velRight;
        }

        //Rotation of RigidBody2D
        if (m_velocity.magnitude > 0.001)
        {
            m_velocity.Normalize();
            m_velocity *= m_curSpeed;
            m_rigidbody2D.velocity = m_velocity;
            m_angle = Mathf.Atan2(m_rigidbody2D.velocity.y, m_rigidbody2D.velocity.x) * Mathf.Rad2Deg - 90;
            transform.rotation = Quaternion.AngleAxis(m_angle, new Vector3(0, 0, 1));
        }
        else
        {
            m_rigidbody2D.velocity = new Vector2(0,0);
        }


        //Variables
        if (m_rigidbody2D.velocity != new Vector2(0, 0))
            m_isMoving = true;
        else
            m_isMoving = false;

        //Animations
        if (m_isMoving)
            m_animator.SetBool("Moving", true);
        else
            m_animator.SetBool("Moving", false);

    }


    public void Function01()
    {
        Debug.Log("in function01 : " + countdownFunction01);
        if (countdownFunction01 <= 0)
        {
            Instantiate(TitTat, transform.position, transform.rotation);

            countdownFunction01 = 2;
            Debug.Log("InsideThe if ! : " + countdownFunction01);
        }

    }

    public void Function02()
    {
        if (countdownFunction02 <= 0)
        {
            Button_Function_02.GetComponent<Button>().image.color = Color.red;
            clicFunction2 = 1;
        }
    }

    public void Function03()
    {
        if (countdownFunction03 <= 0)
        {
            m_boost = true;

            countdownFunction03 = 7;
        }

    }

    public void Function04()
    {
        if (countdownFunction04 <= 0)
        {

            countdownFunction04 = 10;
        }
    }

    public void Function05()
    {
        if (countdownFunction05 <= 0)
        {

            countdownFunction05 = 15;
        }
    }

    public void Function06()
    {
        if (countdownFunction06 <= 0)
        {

            countdownFunction06 = 22;
        }
    }

}