Add marketplace button functionality and skill unlocker integration

scripts/game_manager.gd

@@ -68,6 +68,14 @@ func get_kid_nodes() -> Array[CollectableComponent]:
 	return kid_nodes
 
 
+
+func get_player_node() -> Node:
+	for node in nodes_in_scene:
+		if node is PlayerController:
+			return node
+	return null
+
+
 func add_coins(amount: int) -> void:
 	player_state["coins"] += amount
 	player_state["coins"] = max(0, player_state["coins"])
@@ -213,7 +221,6 @@ func on_level_complete() -> void:
 	SaveSystem.save_game()
 
 
-
 func get_unlocked_skills() -> Array:
 	var skills_unlocked        = player_state.get("unlocked_skills", [])
 	var skills_current_session = current_session_state.get("skills_unlocked", [])