How many chapters of it do you have? You said you've had this story in mind for months, so I guess you worked hard to write it. From what I've read, it seems quite good, and the things that inspired you to write this, I admit, make it look even more interesting. Sherlock Holmes and Xenogears, that surely is a strange mix!
It's really different from your older stories, I think. But it's as good as them, if not better. It seems more "mature" from some point of view. Not that the older ones were bad at all
Sorry, maybe my comment doesn't sound as clear as I wanted it to be.