It is possible to make it so you can deploy your games on your own server, but I will be building a real solution for that in the future. User management and room management would be the two big things needed to host on your own server.
As of right now, the games will only work online at acos.games.
I'm not sure I follow about the open source part? ACOS.games will run your server code for you, whether you want to make it open source or not is up to you. However, we do generate a GitHub repo for every form submitted to create a new game for users to submit issues. You do not have to use it for your code.
Your server code will be protected behind a private object storage bucket, but client code will be on public bucket.
The technology is replicated in the ACOS simulator, which is open source.
https://sdk.acos.games/simulator/
It is possible to make it so you can deploy your games on your own server, but I will be building a real solution for that in the future. User management and room management would be the two big things needed to host on your own server.
As of right now, the games will only work online at acos.games.