Added User Manual and fixes

Added help button on the title screen with animation. Added User Manual to appear after clicking the button, and vice versa. Added tons of catches to handle unwanted errors.

Assets/Scripts/Game/CreatePlayerJoinCards.cs

@@ -21,8 +21,15 @@ namespace Game
 
         public PlayerJoinCard CreateCard() // Creates a player join card
         {
-            GameObject card = Instantiate(playerJoinCardPrefab, transform);
-            return card.GetComponent<PlayerJoinCard>();
+            try
+            {
+                GameObject card = Instantiate(playerJoinCardPrefab, transform);
+                return card.GetComponent<PlayerJoinCard>();
+            }
+            catch
+            {
+                return null;
+            }
         }
     }
 }