It would not require much effort to go after me. I’d be using code hosting services like codeberg or github. They would only have to write an email to the hosting provider, which would take a look at the publicly hosted code and shut it down if there is any copyright infringement. So to answer your question: Pretty much everyone would be powerful enough, and if the project is successful it should be worth it for the game company to go after me. Therefore, I would want to make sure there is no claim for copyright infringement to begin with on the mothership-website. Building a community around a project that has to switch domains on a monthly basis would not inspire trust.