The game closes on its own.

We apologize for the inconvenience.
Please report the issue via "Menu" → "Contact" in the top right of the Home screen.

Please make sure you have the latest version of Sin of OZ.
To update to the latest version, you will need to access the store you downloaded it from.
If you search the store for "Sin of OZ", you will see an "Update" button if an update is available.