Added Load Level Item List with back button that works

Assets/scripts/Main Menu.gd

@@ -19,4 +19,10 @@ func _on_settings_pressed():
 
 
 func _on_load_level_pressed():
-	pass # Replace with function body.
+	$VBoxContainer.hide()
+	$ItemList.show()
+
+func _on_item_list_item_clicked(index, at_position, mouse_button_index):
+	if index == 0:
+		$ItemList.hide()
+		$VBoxContainer.show()