Three kinds of bullets are firing, bomb breaks the wall

Assets/Scripts/Damagers/IceDamager.cs

@@ -0,0 +1,12 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+//shootable
+public class IceDamager : DamagerBase {
+	void OnTriggerEnter2D(Collider2D collider) {
+		if (collider.gameObject.GetComponent<IceDamager> () == null) { //pass through other instances of self
+			Destroy (gameObject);
+		}
+	}
+}