Hello, there is a somewhat cumbersome way to play without creating a user account to see if the game interests you or not (ideally, having a user account enables the avatar functionality and allows you to play multiplayer with friends).

The method is to deactivate the Wi-Fi when opening the game at the login screen. There, you will be given the option to play offline.

(In the next update, we might consider enabling the option to play offline by default. It could be the healthier approach)