The project is still going on. You can follow the Author's Patreon: https://www.patreon.com/KamuoGame
The Author have five projects now and have a very slow update on AGRSS now, even thought its his main project.
As a post in 2022-10-24 in some forum, the version should have over V1.5. I didn't add the Patreon so I didn't got the update game for sure.