Fixed score computation and added mouth masks

scenes/managers/game_manager.gd

@@ -28,6 +28,7 @@ class_name GameManager
 @export var lvl3_guest_2: MaskedChara
 
 @export_category("Random levels")
+@export var current_level: Levels = Levels.LVL1
 @export_tool_button("Create chara roster") var create_roster_action = create_new_roster
 
 var current_chara_roster: Array[MaskedChara]
@@ -44,7 +45,6 @@ enum Levels {
 	RANDOM
 }
 var current_game_state = GameState.READY
-var current_level = Levels.LVL2
 var first_guest = true
 var current_guest: MaskedChara
 var selected_seat: Seat