Blocks are all acting correctly, bomb is acting correctly

Assets/Scripts/Damagers/DamagerBase.cs

@@ -1,5 +1,16 @@
-using UnityEngine;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
 
 public class DamagerBase : MonoBehaviour {
 	public int value = 1;
+
+	void Awake() {
+		StartCoroutine (DestroySelfAfter (30));
+	}
+
+	IEnumerator DestroySelfAfter(float delay) {
+		yield return new WaitForSeconds (delay);
+		Destroy (gameObject);
+	}
 }