first location is playable

enemies and so on

Assets/Code/Gameplay/Enemies/BasicEnemy.cs

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+using UnityEngine;
+using Code.Gameplay.Player;
+using DG.Tweening;
+
+namespace Code.Gameplay.Enemies
+{
+    public class BasicEnemy : MonoBehaviour, IEnemy
+    {
+        [SerializeField] private float _speed = 2f;
+        [SerializeField] private float _patrolDistance = 3f;
+
+        [SerializeField] private int _health = 2;
+        
+        [SerializeField] private SpriteRenderer _spriteRenderer;
+        
+        [SerializeField] private float _blinkDuration = 0.2f;
+        [SerializeField] private Color _hitColor = Color.red;
+        
+        private Color _originalColor;
+
+        private Vector3 _startPosition;
+        private bool _facingRight = true;
+
+        private void Start()
+        {
+            _startPosition = transform.position;
+        }
+
+        private void Update()
+        {
+            Patrol();
+        }
+
+        private void Patrol()
+        {
+            var targetX = _facingRight 
+                ? _startPosition.x + _patrolDistance 
+                : _startPosition.x - _patrolDistance;
+
+            transform.position = Vector3.MoveTowards(
+                transform.position,
+                new Vector3(targetX, transform.position.y, transform.position.z),
+                _speed * Time.deltaTime
+            );
+
+            if (Mathf.Approximately(transform.position.x, targetX))
+            {
+                Flip();
+            }
+        }
+
+        private void Flip()
+        {
+            _facingRight = !_facingRight;
+            transform.localScale = new Vector3(
+                -transform.localScale.x,
+                transform.localScale.y,
+                transform.localScale.z
+            );
+        }
+
+        private void OnTriggerEnter2D(Collider2D other)
+        {
+            if (!other.CompareTag("Player")) return;
+            
+            var playerHealth = other.GetComponent<PlayerHealth>();
+            playerHealth?.TakeDamage();
+        }
+
+        public void TakeDamage()
+        {
+            _health--;
+            BlinkHit();
+            if (_health <= 0)
+            {
+                Die();
+            }
+        }
+        
+        private void BlinkHit()
+        {
+            var originalColor = _spriteRenderer.color;
+            var hitColor = new Color(_hitColor.r, _hitColor.g, _hitColor.b, originalColor.a);
+
+            DOTween.Sequence()
+                .Append(_spriteRenderer.DOColor(hitColor, _blinkDuration / 4))
+                .Append(_spriteRenderer.DOColor(originalColor, _blinkDuration / 4))
+                .Append(_spriteRenderer.DOColor(hitColor, _blinkDuration / 4))
+                .Append(_spriteRenderer.DOColor(originalColor, _blinkDuration / 4))
+                .SetEase(Ease.Linear)
+                .SetLink(gameObject);
+        }
+
+        private void Die()
+        {
+            Destroy(gameObject);
+        }
+    }
+}

Assets/Code/Gameplay/Enemies/BasicEnemy.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 1dd5d179d7dc4551ad044f2f8a8986ae
+timeCreated: 1770111900

Assets/Code/Gameplay/Enemies/IEnemy.cs

@@ -0,0 +1,7 @@
+namespace Code.Gameplay.Enemies
+{
+    public interface IEnemy
+    {
+        void TakeDamage();
+    }
+}

Assets/Code/Gameplay/Enemies/IEnemy.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: a15b885d0f044bddb4669eb39d19eb8e
+timeCreated: 1770111890

Assets/Code/Gameplay/Enemies/VoidEnemy.cs

@@ -0,0 +1,19 @@
+using Code.Gameplay.Player;
+using UnityEngine;
+
+namespace Code.Gameplay.Enemies
+{
+    public class VoidEnemy : MonoBehaviour, IEnemy
+    {
+        public void TakeDamage() { }
+        
+        private void OnTriggerEnter2D(Collider2D other)
+        {
+            if (other.CompareTag("Player"))
+            {
+                var playerHealth = other.GetComponent<PlayerHealth>();
+                playerHealth?.TakeDamage(true);
+            }
+        }
+    }
+}

Assets/Code/Gameplay/Enemies/VoidEnemy.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 64a245a9516a4ec6a617ded117483d32
+timeCreated: 1770112280