you can now have as MANY checkpoints as you want, in as many rooms as you want!

Scripts/Classes/Editor/LevelEditor.gd

@@ -160,7 +160,7 @@ func _physics_process(delta: float) -> void:
 		elif current_state == EditorState.TILE_MENU:
 			close_tile_menu()
 	if Input.is_action_just_pressed("editor_play") and (current_state == EditorState.IDLE or current_state == EditorState.PLAYTESTING) and Global.current_game_mode == Global.GameMode.LEVEL_EDITOR:
-		Checkpoint.passed = false
+		Checkpoint.passed_checkpoints.clear()
 		if current_state == EditorState.PLAYTESTING:
 			stop_testing()
 		else:

Scripts/Classes/Entities/Objects/CheckpointFlag.gd

@@ -10,7 +10,7 @@ func _ready() -> void:
 		owner.queue_free()
 		return
 	owner.show()
-	if Checkpoint.passed:
+	if owner.passed:
 		sprite.hide()
 		activated.show()
 

Scripts/Classes/LevelClass.gd

@@ -159,7 +159,7 @@ func transition_to_next_level() -> void:
 	first_load = true
 	SaveManager.write_save()
 	Global.transition_to_scene("res://Scenes/Levels/LevelTransition.tscn")
-	Checkpoint.passed = false
+	Checkpoint.passed_checkpoints.clear()
 
 func reload_level() -> void:
 	LevelTransition.level_to_transition_to = Level.start_level_path

Scripts/Classes/Singletons/Global.gd

@@ -263,7 +263,7 @@ func activate_p_switch() -> void:
 
 func reset_values() -> void:
 	PlayerGhost.idx = 0
-	Checkpoint.passed = false
+	Checkpoint.passed_checkpoints.clear()
 	Checkpoint.sublevel_id = 0
 	Door.unlocked_doors = []
 	Checkpoint.unlocked_doors = []