Indeed, the game is not available to run in Nox. I downloaded and installed the application, attached a Google Account then tried to install Clash of Clans, but the game can't be found. Initially, I though it's a country restriction policy in effect and used my phone to locate the game and it's there which means Nox is not compatible with the game and that's why is now shown in results.
Contact the developers using the following mail to report this issue: support@bignox.com
