Thank you! I'm glad you think so highly of my game. :)
You're right that player WG has made development significantly more complex. That trend'll only continue with all the other features I plan to add.
With the narrative endpoint, what I'll do is add a message similar to when a girl reaches that stage, letting the player know they've reached the end of the visible changes.
Also, you're in luck. In the update I'm working on at the moment, I've created a system that lets the NPC feeders run the Dizzy's shop. They'll invite you there & you'll be able to experience Dizzy's addiction for yourself!
I don't have any plans to monetise the game, but if anyone did wish to show their support in that way, feel free to check out my weight gain stories on Amazon.