Mediocre, short, and not very detailed. Good atmosphere. Not impressive. The game was meant for the DS. It was obviously ported to PC, and has graphics comparable to a mobile game system, which is not very good for PC.
The action gameplay is basic, the voice acting is acceptable, and the "detective" sequences are basic "click everything" with minimal actual puzzles. I ran through in a very short period of time, then uninstalled, as it has zero replay ability, and rather want the time and money back.
The film-noir that it clings to is all that makes it tolerable, the game fits the word "mediocre" quite well. I've gotten more enjoyment for less money from MANY other things.