added brightness slider

src/gui/menu/options.gd

@@ -1,5 +1,13 @@
 extends Control
 
+@export var first_selection: Control
+
+var last_menu: Control
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	first_selection.grab_focus()
+
 func _on_back_button_pressed():
-	get_parent().get_child(0).show()
+	last_menu.show()
 	queue_free()