Yeah I don't understand a single word of Japanese, but I've just remembered where all the options I want are on my ID L.
I started out using a guide though
Most, if not all Wolf Spider Species have the exact same layout on their face for their eyes making them easy to identify as a wolf spider globally. Well. If you're willing to look closely at a spider's face that is.
Show/Hide Spider's face
I would try cleaning the contacts between the buttons and the chip and the buttons themselves. I recommend Isopropyl alcohol to clean it. You will have to pretty well dismantle the Tamagotchi to do it, so make sure you're comfortable with doing that first.
Beyond that though I'm not too sure...