added main menu and can continue from last level

scripts/level_sign.gd

@@ -9,7 +9,7 @@ extends Node3D
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	level_name.text = portal_node.scene_name
-	gamemode_label.text = portal_node.gamemode.gamemode_name
+	gamemode_label.text = portal_node.level_gamemode.gamemode_name
 
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.