LD56 is over. This is the game.

addons/godot_debug_environments/data.gd

@@ -0,0 +1,21 @@
+class_name LinkData extends RefCounted
+
+var links:Dictionary
+
+func _init() -> void:
+	load_scene_links()
+
+func has_link(original_scene:String)->bool: return links.keys().has(original_scene)
+
+func get_link(original_scene:String)->String: return links[original_scene] as String
+
+func save_scene_link(original_scene:String, target_scene:String):
+	links[original_scene] = target_scene
+	var file = FileAccess.open("res://addons/godot_debug_environments/links.json", FileAccess.WRITE)
+	file.store_string(JSON.stringify(links))
+	file.close()
+
+func load_scene_links():
+	var file = FileAccess.open("res://addons/godot_debug_environments/links.json", FileAccess.READ)
+	links = JSON.parse_string(file.get_as_text())
+	file.close()