I've played the demo, and this looks interesting! The "culprit" of the demo case (I won't spoil which suspect it is) was enough of a jerk that taking them down was very satisfying.
The main character's nickname being Watson is also intriguing, both because he provides the final hint to prove Sherly's case, but also because this protagonist may have a larger role than most Watsons in fiction usually do, given "a certain something that happens at the end of the demo", I won't spoil what.
I'm sold! When you release the Kickstarter for this, I'll pledge to this project.