Add controller ui

ui/pause/PauseMain.gd

@@ -4,11 +4,12 @@ func _ready() -> void:
   visible = false
   $HBoxContainer/ItemList.item_selected.connect(onItemSelected)
 
-func open():
+func open() -> void:
   visible = true
   $HBoxContainer/ItemList.clear()
+  $HBoxContainer/ItemList.grab_focus()
 
-func close():
+func close() -> void:
   visible = false
 
 func isOpen() -> bool:

ui/pause/PauseMenu.gd

@@ -17,3 +17,14 @@ func close() -> void:
   visible = false
   MAIN.close()
   SETTINGS.close()
+
+func _unhandled_input(event:InputEvent) -> void:
+  if !visible:
+    return
+  if event.is_action_pressed("ui_cancel"):
+    if SETTINGS.isOpen():
+      SETTINGS.close()
+      MAIN.open()
+    else:
+      close()
+    get_viewport().set_input_as_handled()