That actually gives me some ideas. But I suppose that stuff I'll explore with you later on. As for the drawing animation, I got some ideas for that too.
Anyway, LO had a system where you had a treasure list, and basically when you unlock new hints it will tell you where to go. There's a list in the menu (under treasure) and it will describe a person, or a place that you need to go to. When you get there and are close to the location, the controller vibrates more and more until you find it.
Basically, it's just like hot and cold but for treasure. I imagine, the menu (or NPC like Akyu/Aya in the newspaper) would give you a list of interesting topics and people (maybe you could interview them with Aya, so you need to find interesting things to put in the newspaper for Aya) and your reward for doing so is an item or spell. It's just a rough concept, but I imagine that's a touhou way or doing things. Could be as quirky and weird or serious as we want, and adds some nice story elements to gameplay (or...vice versa).
Anyway, my crazy idea for tiles and 3D graphics would simply to use them as 2D images. Basically how IaMP draws the 3D texture except I can resize it in photoshop and/or animate it as normal. The effect should ultimately be just another gif/set of images that you can use without having to handle 3D files. For the environments, usually in 3D you make tileable textures, which is essentially what we're doing, but I wonder if we can do a fake 3D as in... Well... Like the 3D elements again in 2D space. So it's all side on (or top down) and there's no camera rotation (kill my sprites or make them Disgaea style - actually, a random thought is why I didn't do it like Disgaea in the first place... much easier for one guy), but everything looks nicer since it's in 3D. The downside is there the missions need to be layed out, unless I create tiles from 3D graphics that can replace the pixel ones.
If this is making no sense to you, then ignore it until I can test it out with the magic circle and perhaps get a few sample tiles done.