Unity：Rigidbody 2Dを利用した簡単なゲームのヒント

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

public class Move : MonoBehaviour
{
	[SerializeField]
	float speed = 5.0f;
	private Animator animator;

	// Start is called before the first frame update
	void Start()
	{
		animator = GetComponent<Animator>();    
	}

	// Update is called once per frame
	void Update()
	{
		if (Input.GetKey(KeyCode.LeftArrow))
		{
			animator.SetBool("Left", true);
			animator.SetBool("Right", false);
			transform.position += Vector3.left * speed * Time.deltaTime;
		}
		else if (Input.GetKey(KeyCode.RightArrow))
		{
			animator.SetBool("Right", true);
			animator.SetBool("Left", false);
			transform.position += Vector3.right * speed * Time.deltaTime;
		}
		else
		{
			animator.SetBool("Right", false);
			animator.SetBool("Left", false);
		}
	}
}

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

public class Apple : MonoBehaviour
{
	private enum STATUS
	{
		GAME,
		GAMEOVER
	}

    GameObject gameControl;
	STATUS status;

    // Start is called before the first frame update
    void Start()
    {
		status = STATUS.GAME;
        gameControl = GameObject.Find("GameControl");
    }

	private void OnCollisionEnter2D(Collision2D collision)
	{
		if (collision.gameObject.CompareTag("Ground"))
		{
			status = STATUS.GAMEOVER;
			gameControl.GetComponent<GameMain>().GameOver();
		}
	}

	private void OnTriggerEnter2D(Collider2D collision)
	{
		if (status == STATUS.GAME && collision.gameObject.CompareTag("Usagi")){
			gameControl.GetComponent<GameMain>().GameClear();
            Destroy(gameObject, 0.2f);
		}
	}
}

using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class GameMain : MonoBehaviour
{
    public Text StatusMessage;
	public GameObject apple;

	public void Start()
	{
		Instantiate(apple, new Vector2(Random.Range(-9f, 9f), Random.Range(6f, 8f)), Quaternion.identity);

	}

	private void GameStart()
	{
		SceneManager.LoadScene("KumaGame");
	}

    public void GameClear()
	{
        StatusMessage.text = "CLEAR !!";
		Invoke(nameof(GameStart), 5f);
	}

    public void GameOver()
	{
        StatusMessage.text = "GAME OVER!";
		Invoke(nameof(GameStart), 3f);
	}
}