Is it possible to delete the account and start the game over?
Sadly, there is no way to reset your progress. However, you can enter the game via another acoount (for example, your social network account) or play via guest account.
Note, that if you play via guest account, you account will be merged with your social network account after you log in using social network.
If you have any questions,
you can submit a ticket to the technical support team.