Added unlock mechanic with testing if player has all items in inventory.

Scripts/World/Layer.cs

@@ -264,4 +264,14 @@ public partial class Layer : Node3D
 		}
 		return result;
 	}
+
+	public string DisplayGateIngredients()
+	{
+		string result = "";
+		foreach (Ingredient ingredient in gateIngredients)
+		{
+			result += $"{ItemData.GetReadableName(ingredient.Item)} ({ingredient.Amount})\r";
+		}
+		return result;
+	}
 }