I also found a way to not violate GPLv3, while keeping an "early access" feature for my Mastodon.
Also thanks to @NovaSquirrel for reminding me that GPLv3 is likely the best option!
Also you should play her game(s), they're good!
@maxine Also keep in mind that you can still put whatever license you want on the non-code parts of the game (levels, graphics, etc.) and if you haven't given someone access to a build you're not required to give them access to the source corresponding to that build.
