UPDATE (03.02.2020.) : Feature will be removed soon
Unfortunately, we can’t change your username. You can, however, change your username and picture between your Facebook Account and your Miniclip Account. Just go to https://miniclip.com/user/settings/ and log in with your Miniclip and Facebook accounts and select between the 2 names displayed.
If you don't have a Facebook account connected, you will always have to keep the initial username you’ve used when the account was created.
We are sorry for any inconvenience this may have caused you.