I definitely feel what you about keeping the scope managable especially for a solo dev, usually I like to do everything myself as well. But I've started coming to a realization that maybe I need to branch out more haha.
Portfolio wise, here's 2 videos of projects with music I've done. I also have game ideas (especially the pain prototype one I definitely want to finish that someday):
And of course thank you for your cool game and storytelling!