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.
Hey there, thanks for playing!
I consider this game finished content-wise. It took so long to make and it was very much a learning process.
The next thing I work on will be a new project, although I have no specific plans at the moment.