I really wish this game got the attention it deserves. I would subscribe to the patreon, but it's been almost a year since there has been an update to the game, so I'm not sure what I'd be supporting
So looking at the patreon, it seems that it's been updated with what they're calling standalone events. Basically, a renpy program with just that singlar event, like you see with Amazon island I guess. But these will only get updates into the main game when they're finished, or just get enough new content to matter.
The version on patreon had a update near the end of April, I think related to the Gotham Content.