Kept goiong, but not quite happy.

scripts/End.gd

@@ -1,5 +1,5 @@
-extends Control
-
+extends CanvasLayer
+var mainScene
 
 # Called when the node enters the scene tree for the first time.
 func _ready():
@@ -16,5 +16,13 @@ func _on_quit():
 	get_tree().quit()
 	
 func _on_play():
-	get_tree().change_scene_to_file("res://scenes/main.tscn")
+	$".".hide()
+	var w = get_node("/root/World");
+	
+	if !w:
+		get_tree().change_scene_to_file( "res://scenes/main.tscn" )
+	else:
+		w.load_level()
+		w.player_spawn()  
+		w.show()
 

scripts/Splash.gd

@@ -1,5 +1,5 @@
-extends Control
-
+extends CanvasLayer
+var start = preload("res://scenes/UI/Start.tscn").instantiate()
 
 # Called when the node enters the scene tree for the first time.
 func _ready():
@@ -16,5 +16,7 @@ func _on_quit():
 	get_tree().quit()
 	
 func load_start_menu():
-	get_tree().change_scene_to_file("res://scenes/UI/Start.tscn")
+	$".".hide()
+	get_tree().get_root().add_child( start )
+	#get_tree().change_scene_to_file("res://scenes/UI/Start.tscn")
 

scripts/Win.gd

@@ -0,0 +1,27 @@
+extends CanvasLayer
+var mainScene
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	#$CenterContainer/VBoxContainer/Button05.button_up.connect( _on_quit )
+	#$CenterContainer/VBoxContainer/Button01.button_up.connect( _on_play )
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	pass
+
+func _on_quit():
+	get_tree().quit()
+	
+func _on_play():
+	$".".hide()
+	var w = get_node("/root/World");
+	
+	if !w:
+		get_tree().change_scene_to_file( "res://scenes/main.tscn" )
+	else:
+		w.player_spawn()  
+		w.show()
+

scripts/World.gd

@@ -3,12 +3,17 @@ extends Node2D
 var gravity = ProjectSettings.get_setting("physics/2d/default_gravity")
 var gravity_vector = ProjectSettings.get_setting("physics/2d/default_gravity_vector")
 var player = load("res://scenes/pDasher.tscn")
-var level = load("res://scenes/levels/level_1.tscn")
+var level
 var direction: int = 1
 var paused: bool = false
 var asp: AudioStreamPlayer
 var switch_gravity_sound = preload("res://audio/switch_gravity.wav")
-
+var win = preload("res://scenes/UI/Win.tscn").instantiate()
+var end = preload("res://scenes/UI/End.tscn").instantiate()
+@export var Levels: Array[Resource] = [ preload("res://scenes/levels/level_0.tscn"), preload("res://scenes/levels/level_1.tscn") ]
+var level_n: int = 0
+var pDasher
+ 
 
 ## WORLD METHODS
 func switch_gravity():
@@ -20,17 +25,40 @@ func switch_direction():
 
 ## NAVIGATION
 func player_fail():
-	get_tree().change_scene_to_file("res://scenes/UI/End.tscn")
+	$".".hide()
+	#$pDasher.queue_free()
+	
+	#ONLY IF NOT THERE ALREADY
+	
+	if !$"."/End :
+		get_tree().get_root().add_child( end )
+	else:
+		$"."/End.show()
+	#get_tree().change_scene_to_file("res://scenes/UI/End.tscn")
 	
 func player_win():
-	get_tree().change_scene_to_file("res://scenes/UI/Win.tscn")
+	level_n += 1
+	load_level()
+	$"." .hide()
+	get_tree().get_root().add_child( win )
+	#get_tree().change_scene_to_file("res://scenes/UI/Win.tscn")
 
+func player_spawn():
+	pDasher.position = Vector2(0,0  )
+
+func load_level():
+	if level_n == null:
+		level_n = 0
+	level = Levels[level_n]
+	
 func _ready():
 	
+	load_level()
+		
 	asp = $AudioStreamPlayer
 	
 	#load player and level
-	get_node("/root/World").add_child( player.instantiate() ) #absolute way...
+	get_node("/root/World").add_child( player.instantiate() )
 	get_node("/root/World").add_child( level.instantiate() ) #relative way meaning <ME> or whatever node this script is attached to.
 	
 	# manage signals connections
@@ -51,7 +79,9 @@ func _ready():
 	for checkpoint in checkpoints:
 		#print( checkpoint )
 		checkpoint.body_entered.connect( _on_checkpoint_body_entered )
-
+		
+	pDasher = get_node("/root/World/pDasher")
+	player_spawn()
 ## MAIN
 #func _process(delta):
 	#pass
@@ -70,8 +100,8 @@ func _on_gswitch_body_entered(body):
 	switch_gravity()
 
 func _on_dswitch_body_entered(body):	
-	var dasher = get_node("/root/World/pDasher")
-	dasher.switch_direction()
+	pDasher
+	pDasher.switch_direction()