Goose Goose Duck's server has been temporarily shut down on January 10 due to continuous anonymous attacks.
SERVER SHUTDOWN FOR MAINTENANCE
— Goose Goose Duck (@ggd_game) January 9, 2023
We are temporarily shutting down the game for maintenance. We'll explain in more depth later, but we've been undergoing attacks for days. We will update when we are back online. Sorry for the inconvenience. pic.twitter.com/DfVdBF1Irn
The development team apologized to Steam and Twitter and admitted that their server has been receiving a massive attack recently.
Update: The server is now back online.
Update
Source: Twitter