Player No-Redflash phan 9

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

public class Player : MonoBehaviour {

    public float speed = 50f, maxspeed = 3, maxjump = 4, jumpPow = 220f;
    public bool grounded = true, faceright = true, doublejump = false;

    public int ourHealth;
    public int maxhealth = 5;

    public Rigidbody2D r2;
    public Animator anim;

    // Use this for initialization
    void Start () {
        r2 = gameObject.GetComponent<Rigidbody2D>();
        anim = gameObject.GetComponent<Animator>();
        ourHealth = maxhealth;
    }

    // Update is called once per frame
    void Update () {
        anim.SetBool("Grounded", grounded);
        anim.SetFloat("Speed", Mathf.Abs(r2.velocity.x));

        if (Input.GetKeyDown(KeyCode.Space))
        {
            if (grounded)
            {
                grounded = false;
                doublejump = true;
                r2.AddForce(Vector2.up * jumpPow);

            }

            else
            {
                if (doublejump)
                {
                    doublejump = false;
                    r2.velocity = new Vector2(r2.velocity.x, 0);
                    r2.AddForce(Vector2.up * jumpPow * 0.7f);

                }
            }




        }
    }

    void FixedUpdate()
    {
        float h = Input.GetAxis("Horizontal");
        r2.AddForce((Vector2.right) * speed * h);

        if (r2.velocity.x > maxspeed)
            r2.velocity = new Vector2(maxspeed, r2.velocity.y);
        if (r2.velocity.x < -maxspeed)
            r2.velocity = new Vector2(-maxspeed, r2.velocity.y);

        if (r2.velocity.y > maxjump)
            r2.velocity = new Vector2(r2.velocity.x, maxjump);
        if (r2.velocity.y < -maxjump)
            r2.velocity = new Vector2(r2.velocity.x, -maxjump);



        if (h>0 && !faceright)
        {
            Flip();
        }

        if (h < 0 && faceright)
        {
            Flip();
        }

        if (grounded)
        {
            r2.velocity = new Vector2(r2.velocity.x * 0.7f, r2.velocity.y);
        }

        if (ourHealth <= 0)
        {
            Death();
        }
    }

    public void Flip()
    {
        faceright = !faceright;
        Vector3 Scale;
        Scale = transform.localScale;
        Scale.x *= -1;
        transform.localScale = Scale;
    }

    public void Death()
    {
        SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
    }

    public void Damage(int damage)
    {
        ourHealth -= damage;

    }

    public void Knockback (float Knockpow, Vector2 Knockdir)
    {
        r2.velocity = new Vector2(0, 0);
        r2.AddForce(new Vector2(Knockdir.x * -100, Knockdir.y * Knockpow));
    }
}