This is the final version of Faye's Donkey Farm. It is a complete game as is and I learned a lot about using Twine and game design in general while working on it. I don't plan to make a more complex or longer paid version anywhere in the future.
The new game I'm working on, Space Station HABITAT, will be more of a complete game in time, and depending on how it develops, might have a full paid version at some point.