After reading the comments in this section i have to agree that if the game is expanded any future versions should be behind a paywall. I've already donated a few times during development just because i believed in the project, paying for more content is no big issue on my part. As another comment stated, doing something similar to Cruel Serenade with the first "chapter" serving as a free demo and the rest being behind paywall would be (in my opinion) the best course of action should you decide to continue on this project.