I’m planning on releasing a free template that people can open and edit in Godot to make their own themes, but i have to finish the iOS and Android versions first. Hopefully soon.
As for open sourcing it, that will probably never happen because it will add more work (project management, code refactoring, support, and administrative work) that I don’t have the time and energy for. I have to be able to work on the project at my own pace for it to be sustainable.