Having played this game, I can definitely say it was spooky, vague but also intriguing. It was like some kind of dream sequence mixed with Goosebumps. The disclaimer at the beginning was a nice touch. It felt like a throw back to classic Law&Order, back when they used to have disclaimers. The pink sorcerer girl (Madoka Paradise?) gave me Dark Magician Girl vibes from Yugioh. Even though this is a Visual Novel, I feel this has the potential for a great adventure similar to Dragon Quest 8. Little spoiler here, in DQ8, a character named Dhoulmagus steals a scepter and becomes evil and goes on a quest. The scepter holds an evil spirit controlling him, revealing there is another antagonist behind the scenes. I believe this doll could be portrayed the same way and have final boss energy along with an in-depth backstory.
Either way, this was a charming short novel.