You can absolutely play as a Guest and skip linking an account. However, keep in mind that if you choose to play with a Guest account, your account data will primarily be local. You will be at risk of losing your save data due to device crashes, updates, or deleting the app.
 
While our Support team may help you try and recover your account, your account may be unrecoverable in some cases. We strongly advise linking an account if you wish to keep your account data an progress safe, as you may simply log back in using your platform account in the event of an unforeseen issue.