To delete your account you have to open the game menu. There you'll find the option "Edit Account". If you click on that the "Delete your account" button will be at the bottom. 

You can also request your account to be deleted by our support team. Just use the "Contact us" button at the bottom of this page.

 
⚠️ Please note: When deleting your account all account related data will be deleted  irreversibly! ⚠️