Added respawn logic ... and with it also a complete rehaul of how managing scene instances work to make it work

evolve-die-repeat/game_manager.gd

@@ -1,22 +1,19 @@
 extends Node
 
+# Main scene
+var mainSceneInstance
+
+# Screen
 var screen_size = Vector2(1920.0, 1080.0)  # Default screen size (this is a float for some reason)
 var viewport_size
 @onready var extent: Rect2 = get_viewport().get_visible_rect()
 
-# Main menu & game spawning
-@onready
-var mainMenuScene = preload("res://main_menu.tscn").instantiate()
-@onready
-var gameScene = preload("res://molecular/molecular_stage.tscn").instantiate()
-
 # utils.
 var rng = RandomNumberGenerator.new()
 var eps: float = 1e-4
 
 # managers
-@onready
-var foodManager = gameScene.get_node("FoodManager")
+var foodManager: FoodManager2D
 
 # A world "current"
 # polar
@@ -33,24 +30,26 @@ var t: float = 0.0
 
 
 func _ready() -> void:
+	# Start game
+	mainSceneInstance = get_tree().root.get_child(-1)
+
 	# Create viewport
 	viewport_size = get_viewport().get_visible_rect().size
-	
-	# Create game (main menu)
-	add_child(mainMenuScene)
-	
+
 	# initial world current
 	get_new_flow()
 
+
 func _physics_process(delta: float) -> void:
 	t += delta
 	
 	# Flow current change
 	if abs(fmod(t, flowT)) < eps:
 		get_new_flow()
-	
-func start_game() -> void:
-	add_child(gameScene)
+
+func switch_scene(name:String) -> void:
+	if name == "respawn":
+		mainSceneInstance.go_to_respawn_scene()
 
 # TODO: This needs to be called from a script inheriting a CharacterBody2D (e.g. the player)
 # Alternative would be to pass the player reference to this script (which might be better?)
@@ -67,15 +66,14 @@ func get_boundaried_position(position):
 	position.x = wrapf(position.x, 0, screen_size.x)
 	position.y = wrapf(position.y, 0, screen_size.y)
 	return position
-	
+
 func get_new_flow():
 	flow_dir = rng.randf()*2*PI
 	flow_mag = rng.randf()
 	
 	flow_x = flow_mag * cos(flow_dir)
 	flow_y = flow_mag * sin(flow_dir)
-	
-	
+
 
 func calc_distance(one, two) -> float:
 	var candidate = one.distance_to(two)