Follow the steps below to change the username:

1. Open the main base screen.
2. Click on the Profile icon, which is located near Quest and Settings icons.
3. On the top you can see your username and a blue button right near it.
4. Tap on this button to edit your username.
5. Confirm changes.

Note that:
- You cannot use nicknames which are already taken by other players.
- Your nickname can be changed as many times as you wish. The first nickname change during the tutorial is free, any further nickname change will cost Gold.