Added project

Platformer/Assets/Scripts/TriggerDamage.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class TriggerDamage : MonoBehaviour {
+
+    [SerializeField] private int damage;
+    [SerializeField] private bool isDestroyingAfterCollision;
+    private IObjectDestroyer destroyer;
+    private GameObject parent;
+    
+    public int Damage {
+        get => damage;
+        set => damage = value;
+    }
+
+    public GameObject Parent {
+        get => parent;
+        set => parent = value;
+    }
+
+    public void Init(IObjectDestroyer destroyer) {
+        this.destroyer = destroyer;
+    }
+
+    private void OnTriggerEnter2D(Collider2D other) {
+        if (other.gameObject == parent) {
+            return;
+        }
+        if (GameManager.Instance.healthContainer.ContainsKey(other.gameObject)) {
+            var health = GameManager.Instance.healthContainer[other.gameObject]; 
+            health.TakeHit(damage);
+        }
+        if (isDestroyingAfterCollision) {
+            if (destroyer == null) {
+                Destroy(gameObject);
+            } else {
+                 destroyer.Destroy(gameObject);
+            }
+        }
+    }
+}