TO SQUASH: More shark.

Assets/Scripts/Game/Shark.cs

@@ -15,7 +15,7 @@ public class Shark : MonoBehaviour
 
     public SpriteRenderer gameBoardSpriteRenderer;
 
-    private Bounds gameBoardBounds;
+    private Bounds? gameBoardBounds = null;
 
     private AudioSource audioSource;
 
@@ -44,7 +44,6 @@ public class Shark : MonoBehaviour
     {
         audioSource = GetComponent<AudioSource>();
         animator = GetComponent<Animator>();
-        gameBoardBounds = gameBoardSpriteRenderer.bounds;
         bool spawnLeft = Random.Range(0, 2) == 0;
         angle = spawnLeft ? 90 : 270;
 
@@ -55,6 +54,11 @@ public class Shark : MonoBehaviour
     // Update is called once per frame
     void FixedUpdate()
     {
+        if (gameBoardSpriteRenderer != null && gameBoardBounds == null)
+        {
+            gameBoardBounds = gameBoardSpriteRenderer.bounds;
+        }
+
         // Check if the spawn animation has finished.
         if (
             (animator.GetCurrentAnimatorStateInfo(0).IsName("SharkSpawnRight") ||

Assets/Scripts/Game/Spawners/SharkSpawner.cs

@@ -14,7 +14,7 @@ public class SharkSpawner : MonoBehaviour
 
     private bool isActive = true;
 
-    private static float spawnProbability = 0.1f;
+    private static float spawnProbability = 0.9f;
 
     // Start is called once before the first execution of Update after the MonoBehaviour is created
     void Start()