feat: add area2d; connect a bodyEntered and bodyLeft signals to that area2d;

Scenes/SceneEntrance/scene_entrance.gd

@@ -0,0 +1,21 @@
+extends Area2D
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass
+
+
+func _on_body_entered(body) -> void:
+	print("body entered!")
+	pass # Replace with function body.
+
+
+func _on_body_exited(body: Node2D) -> void:
+	print("player left!")
+	pass # Replace with function body.