First, let's start with the obvious...this isn't an "exciting" game. This game is more on par with Heavy Rain than Call of Duty, if that makes sense. Lots of puzzles, but no action (that isn't in a cutscene anyway). For what it is, it's good. I found it interesting and entertaining. There are some plot/story holes to be sure...and definitely some playability issues, control issues, and an inexplicable lack of auto-save. However, given that it's from a no-name developer, I'd say the outcome is better than it could have been - it was an entertaining way to spend a few hours, and what more can you ask for?
Short version: Don't play this game. It is the opposite of good.
It has references for people who enjoyed the book, and that's about all it's got going for it other than not crashing like a Bethesda game. Unless you're a fan of terrible tedious puzzles. Not logic/deduction based, as would be expected of a Sherlock game, but annoying temples of Hanoi type puzzles.