I enjoyed solving puzzles. Some of them are challenging (e.g., the symbolic lock and the six-digit lock).
Game play is somewhat tedious as one has to find seven gems and put them back to their corresponding wall slots. Also, one has to collect orbits to trade for shop items. To be honest, I hate that. I was stuck at two points. First, I didn't know how to open a book. Second, I missed a goddamn green gem because of the noisy background. Thanks to the walk through video, I'd not have completed the game without it.
Game atmosphere is just okay. I was a little shock when I saw an animated ghost. Other than that, I see no point to make the background darker than usual.