This is one badly written game. The dialogues are appalling. You constantly have exchanges like "Hey, there is a keyhole here." - "Do you think it opens the door right next to it?" - "Could be." - "You have the key you found a second ago, right?" - "Yes, I think so"(!) - "Do you think it will work here?" - "Maybe, should I try it out?" - "Yes, try it out" - "Ok, I am going to try it now." - "Yes, try it now" (opens door with key). Or you come into a room with a green, blue and red door, and one of the characters exclaims "Hey, there are three doors here, the one on the left is green, the one in the middle is blue and the one on the right is red". Reminds me of old adventure games from the "text only" era, but even then the writing was better. This is not even writing for toddlers, this is just laziness. Either the writers were paid by the word and did not care about the quality of their work, or this is a really really bad translation from Japanese. Although I cannot imagine this being a sensible conversation in Japanese either. It appears that the substance of the dialogues is so thin that they have to add as much filler as possible to drag it out. I found the dialogues in the previous game 999 to already be hard to endure, but this is worse. I honestly wonder if the writers have ever had a human conversation in their life. Nobody talks like that.
Apart from the idiotic and interminable cut scene dialogues, the puzzles are ok, not very hard, but altogether, this is not a good game.