How do I change my password
You can change your password via the settings page.
How do I change my username?
You can't change your username. The username you have chosen at registering is your definitive username.
Why isn't my new password being accepted?
For security reasons we have decided that passwords must have at least a strength level "reliable". Which means that your password must be at least 6 characters or containing two different kind of characters.
There is a strength meter which will help you define your new password.
What is vacation mode?
To stop overall production and have no costs, you can activate the vacation mode. This will freeze your account.
How do I activate vacation mode?
You can activate vacation mode at the preferences page in the settings.
Reset or delete account
To reset your account you just have to open your settings then choose the "reset account" option, it will ask your password and in seconds you can start a new fresh game.