Settings → Delete account → confirm. Your account is closed immediately and permanently deleted after 30 days. Signing in again within those 30 days cancels the deletion.
If you cannot access the app:
Email support@brimminteractive.com from the email address registered in the Game.
Subject: "Account deletion request".
Body: your nickname and your sign-in method (Apple / Google / email).
We verify the request against the registered address and process it within 7 days; as with in-app deletion, the account is permanently deleted 30 days later. If we cannot verify the request comes from the account owner, we may ask for more information.
Deleted: your account, profile, nickname, inventory, in-game balances and push tokens. Kept: match records, anonymised (for your opponents' match history); purchase records, detached from your identity, generally for 5 years as tax law requires. Purchased in-game currency and items are not refunded. Details: Privacy Policy.