Unity) 화살표를 맞는 고양이

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

public class PlayerController2 : MonoBehaviour
{
    public float radius = 1f;
    private float nowY = -3.6f;
    const float MAX_Y = 0f;
    private bool isJump = false;
    private bool isDown = false;


    private float jumpSpeed = 0;

    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        //Clamp로 구현
        float xPos = Mathf.Clamp(this.transform.position.x, -8f, 8f);
        transform.position = new Vector3(xPos, nowY, 0.0f);
        //밖으로 못나가게 하기
        //if (this.transform.position.x >= 8)
        //{
        //    this.transform.position = new Vector3(8f, nowY, 0);
        //}
        //else if (this.transform.position.x <= -8)
        //{
        //    this.transform.position = new Vector3(-8f, nowY, 0);
        //}

        //점프 
        //if (Input.GetKeyDown(KeyCode.UpArrow))
        //{
        //    isJump = true;
        //}
        //if (isJump && this.transform.position.y <= -2.0f)
        //{
        //    this.transform.Translate(0, 0.01f, 0);                      
        //}

        //jumpSpeed *= 0.99f;
        //if(this.transform.position.y > -2.0f)
        //{
        //    isDown = true;            
        //}
        //if(isDown && this.transform.position.y >= nowY)
        //{
        //    this.transform.Translate(0, 0.01f, 0);
        //}


        if (Input.GetKey(KeyCode.LeftArrow))
        {
            this.transform.Translate(-0.1f, 0, 0);
        }

        if (Input.GetKey(KeyCode.RightArrow))
        {
            this.transform.Translate(0.1f, 0, 0);
        }
    }

    public void RButtonDown()
    {
        this.transform.Translate(3f, 0, 0);
    }

    public void LButtonDown()
    {
        this.transform.Translate(-3f, 0, 0);
    }

    private void OnDrawGizmos()
    {
        Gizmos.color = Color.red;
        Gizmos.DrawWireSphere(this.transform.position, radius); 
    }
}

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

public class ArrowController2 : MonoBehaviour
{
    GameObject player;
    public float radius = 0.5f;
    public float ySpeed = -0.1f;
    float distance;
    const float GROUND = -4f;

    // Start is called before the first frame update
    void Start()
    {
        this.player = GameObject.Find("player");
        //this.distance = this.transform.position.y - player.GetComponent<PlayerController2>().transform.position.y;
        
    }

    // Update is called once per frame
    void Update()
    {
        this.distance = Vector2.Distance(this.player.transform.position, this.transform.position);
        var r = this.radius + player.GetComponent<PlayerController2>().radius;

        if (distance <= r)
        {
            Destroy(this.gameObject);
            Debug.Log("고양이랑 부딪힘");
        }

        if(this.transform.position.y <= GROUND)
        {
            Destroy(this.gameObject);
            Debug.Log("땅이랑 부딪힘");
        }

        if(this.transform.position.y >= GROUND)
        {
            this.transform.Translate(0, ySpeed, 0);
        }

        if (distance < r)
        {
            //감독관 한테 알려주기 
            GameObject director = GameObject.Find("App");
            director.GetComponent<App>().DecreaseHp();

            //충돌 
            Destroy(this.gameObject);   //게임 오브젝트 제거 
        }

    }

    private void OnDrawGizmos()
    {
        Gizmos.color = Color.red;
        Gizmos.DrawWireSphere(this.transform.position, radius);
    }


}

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

public class ArrowGenerator : MonoBehaviour
{
    public GameObject arrowPrefab;
    bool isRun = true;
    
    // Start is called before the first frame update
    void Start()
    {        
    }

    float delta;
    float span = 1f;

    // Update is called once per frame
    void Update()
    {
        if(isRun == true)
        {
            this.delta += Time.deltaTime;

            if (this.delta > this.span)
            {
                this.delta = 0;
                GameObject arrowGo = Instantiate(this.arrowPrefab);
                int x = Random.Range(-7, 8); //인수의 float은 inclusive int는 inclusive, exclusive
                arrowGo.transform.position = new Vector3(x, 5.5f, 0);
            }
        }
    }            

    public void Stop()
    {
        //상태를 변경 
        this.isRun = false;
    }
}

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

public class App : MonoBehaviour
{
    GameObject hpGauge;
    public ArrowGenerator arrowGen;
    public Text txtTime;
    private float delta = 10;
    private bool gameover;

    public Button btnR;
    public Button btnL;

    // Start is called before the first frame update
    void Start()
    {
        hpGauge = GameObject.Find("Hp_Gauge");
        var player = GameObject.Find("player").GetComponent<PlayerController2>();
        this.btnR.onClick.AddListener(() =>
        {
            player.RButtonDown();
        });

        this.btnL.onClick.AddListener(() =>
        {
            player.LButtonDown();
        });
    }

    // Update is called once per frame
    void Update()
    {
        if (this.gameover == false)
        {
            this.delta -= Time.deltaTime;
            if (this.delta <= 0)
            {
                this.delta = 0;
                this.gameover = true;
                Debug.Log("Game Over");                
            }
            this.txtTime.text = string.Format("{0:0.0}", this.delta);
        }
        else if(this.gameover == true)
        {
            this.txtTime.text = string.Format("GameOver");
            this.arrowGen.Stop();
        }
    }

    public void DecreaseHp()
    {
        var img = this.hpGauge.GetComponent<Image>();
        img.fillAmount -= 0.1f;
    }
}