It has to be said that with the few-and-far-between nature of games in this genre, the gameplay does feel very dated now, and very slow. With these games only coming out once every few years now, with nothing really changing bar a slight graphical upgrade, it can feel like you've seen it all before.
Trudging around looking for a way to solve a puzzle to progress through a story you don't really care about with a main character you have total indifference for isn't most people's idea of a good time. Jack Keane is one of those games that will do nothing to attract new fans to the genre, but for those of you who have fond memories of LucasArts titles and others in that vein, this might be worth looking into.
Graphics - 7
Gameplay - 6
Sound - 5
Lifespan - 6