I am rather glad I finished the game - I felt that the last hour really dragged on (which isn't great when your game is only three hours long). I really love all kinds of puzzle games, but like others have stated - this isn't quite that. There are some puzzles, a lot of the time though it's less about thinking your way through something but rather a challenge of "find the door". Which would probably be alright, if the story was more engaging (it isn't) or the surroundings were more interactive (they aren't). Overall, there are a handful of interesting puzzles and nice "optical illusions" but a lot of the time you walk through mostly empty halls and corridors that look very samey.
This game has very little going for itself, it appears. Worst to me is the boring gameplay: barely legible riddles that hint at some object, which will have you slowly jogging up and down a street trying to find said object. Other than that, the voices are very bad, the translation is full of errors, and I find the music to be rather tedious. Really, there's nothing to see here - just save yourself the trouble.