No, you can’t change your username.
Your username is your ID and is closely connected to the entire system - it represents your identity.
If you decide to change your identity in the future and remove your past history, we may be able to manually change your username. However, this option is currently only available to game donors (donators) or players who send us a motivation letter.
We respect your privacy and your right to be forgotten, which is why we keep this manual option available.
We may make username changes available to everyone in the future, but for now the ability to change a username is very limited.