☆ once you hit the PC option, you're given a 16-digit code that is a mix of hiragana, katakana, numbers and letters.
☆ when entered on
the m!x land website, will identify your tamagotchi and allow you to play the cake-making game on the site twice a day.
you will need to make a bandai-namco account to access it.
the site also has a couple other features that involve your tamagotchi family tree, and you can save high-res sprites of your tama! example:
☆ remember to hit B once you've entered your code onto the website, and your tamagotchi will disappear with the "おでかけちゅう" sign.
☆ when you're finished with the game, the site will then give you a password on your score page that is only in hiragana characters.
☆ hit B again and you'll be prompted to enter the hiragana code that the site gives you (in the box labeled パスウード, password)
this code will give you the amount of gotchi points you earned from playing the game!
as mentioned, to be able to enter the first code into your browser, you'll have to be able to input japanese characters.
it's fairly easy on a mac, all you have to do is add language in keyboard settings and you can switch to hiragana with capslock and katakana with capslock+shift.
a guide for inputting japanese on a PC was linked above.