Tilemap 위에
시스템 세우기

using UnityEngine;

public class PlayerProgress : MonoBehaviour
{
    [SerializeField, Min(1)]
    private int requiredCollectibles = 3;

    private int collectedCount;
    private Rigidbody2D body;
    private Vector2 startPosition;

    private void Awake()
    {
        body = GetComponent<Rigidbody2D>();
    }

    private void Start()
    {
        startPosition = body.position;
    }

    public void AddCollectible()
    {
        collectedCount++;
        Debug.Log("수집: " + collectedCount + " / " + requiredCollectibles);
    }

    public bool HasAllCollectibles()
    {
        return collectedCount >= requiredCollectibles;
    }

    public void ResetToStart()
    {
        body.linearVelocity = Vector2.zero;
        body.position = startPosition;
    }
}

using UnityEngine;

public class Collectible : MonoBehaviour
{
    private bool collected;

    private void OnTriggerEnter2D(Collider2D other)
    {
        if (collected || !other.CompareTag("Player"))
        {
            return;
        }

        if (!other.TryGetComponent(out PlayerProgress progress))
        {
            return;
        }

        collected = true;
        progress.AddCollectible();
        gameObject.SetActive(false);
    }
}

using UnityEngine;

public class HazardZone : MonoBehaviour
{
    private void OnTriggerEnter2D(Collider2D other)
    {
        if (!other.CompareTag("Player"))
        {
            return;
        }

        if (other.TryGetComponent(out PlayerProgress progress))
        {
            progress.ResetToStart();
        }
    }
}

using UnityEngine;

public class GoalZone : MonoBehaviour
{
    private void OnTriggerEnter2D(Collider2D other)
    {
        if (!other.CompareTag("Player"))
        {
            return;
        }

        if (!other.TryGetComponent(out PlayerProgress progress))
        {
            return;
        }

        if (!progress.HasAllCollectibles())
        {
            Debug.Log("아직 수집물이 남았습니다.");
            return;
        }

        Debug.Log("LEVEL COMPLETE");
    }
}