Added a retry scene and blocker

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Assets/Scripts/Blocker.cs

@@ -0,0 +1,43 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class Blocker : MonoBehaviour
+{
+    [Header("Set in Inspector")]
+    // Speed at which the AppleTree moves
+    public float speed = 1f;
+    // Distance where AppleTree turns around
+    public float leftAndRightEdge = 10f;
+    // Chance that the AppleTree will change directions
+    public float chanceToChangeDirections = 0.1f;
+    // Start is called before the first frame update
+    void Start()
+    {
+
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        // Basic Movement
+        Vector3 pos = transform.position;
+        pos.y += speed * Time.deltaTime;
+        transform.position = pos;
+        // Changing Direction
+        if (pos.y < -leftAndRightEdge) {
+            speed = Mathf.Abs(speed);
+        } else if (pos.y > leftAndRightEdge) {
+            speed = -Mathf.Abs(speed);
+        } 
+    }
+
+    // Update exactly 50 times per second
+    void FixedUpdate() 
+    {
+        if (Random.value < chanceToChangeDirections) {
+            speed *= -1;
+        }
+    }
+
+}

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Assets/Scripts/MissionDemolition.cs

@@ -1,6 +1,8 @@
 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
+using UnityEngine.SceneManagement;
+
 public enum GameMode {
     idle,
     playing,
@@ -45,7 +47,7 @@ public class MissionDemolition: MonoBehaviour {
         castle.transform.position = castlePos;
         shotsTaken = 0;
         // Reset the camera
-        SwitchView("wShow Both");
+        SwitchView("Show Both");
         ProjectileLine.s.Clear();
         // Reset the goal
         Goal.goalMet = false;
@@ -67,7 +69,7 @@ public class MissionDemolition: MonoBehaviour {
             // Change mode to stop checking for level end
             mode = GameMode.levelEnd;
             // Zoom out
-            SwitchView("Show Both" );
+            SwitchView("Show Both");
             // Start the next level in 2 seconds
             Invoke("NextLevel", 2f);
         }
@@ -76,7 +78,8 @@ public class MissionDemolition: MonoBehaviour {
     void NextLevel() {
         level++;
         if (level == levelMax) {
-            level = 0;
+            SceneManager.LoadScene("_Scene_1");
+            return;
         }
         StartLevel();
     }

Assets/Scripts/Retry.cs

@@ -0,0 +1,23 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+public class Retry : MonoBehaviour
+{
+    // Start is called before the first frame update
+    void Start()
+    {
+        
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        
+    }
+
+    public void ChangeScene() {
+        SceneManager.LoadScene("_Scene_0");
+    }
+}

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