Good adventure game as all games from this author. The puzzles are more difficult and very numerous, making this game longer and more challenging then most free point and click adventure games. This game is for hardcore point and click adventuring and puzzle solving / code breaking fans. Casual dabblers in this genre might find this game a bit too hard.
What this game lacks compared to very best point and click adventure games is developed story, characters and dialogues, therefore the score is still but 4 out of 5.