I have a question do you plan to add new characters in the next versions? E.g. the aunt as a guest visitor? Colleagues for the older sister (this can be subsumed under the cheelider missions).
Personally, I think he should do this in a Sequel or something... I mean it IS his first game on Itch and it's free to boot. I'd welcome a new game as well to be honest but not extra content on this.