Hello 🙂 It is a firewall we have created to prevent the game from being stolen. We do not send any e-mails or any e-mails that will disturb you to your e-mail. All your information is safe on itch.io.
When you buy the game, you can log in to the game as you write the mail you were asked when you bought the game, if you still have a problem, I can help you from the support ticket on Discord.
