2d Shooter player phan 3

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

public class Player : MonoBehaviour {

    public float speed = 50f, maxspeed = 3, jumppow = 220f;
    public bool grounded = true, faceright = true, armright = true;

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

    }

    // 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;
                r2.AddForce(Vector2.up * jumppow);
            }
        }

    }

    private 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 (armright && !faceright)
            flip();
        if (armright == false && faceright)
            flip();

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

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