This game certainly enter easily on the rank of 10 best parodies ever made in renpy. Perhaps the best of its kind.
The art is beautiful, as are the + 18 scenes. The character design is very close to the design of the original series.
The story is good, full of hilarious moments, twists and mysteries.
The choice of routes is a great idea, pleasing both romantic public or the most perverted public more attractive.
All books are great, however you will clearly notice the evolution in the matter of art, script and character development, from book 1 to book 4, as the game evolved at the same pace as the author's programming and artistic skills.
The waiting time for each update is "reasonable", taking into account the number of people involved, with that time being around 1 or 2 months.
The only negative points are:
The minigames: very boring. It takes a lot of gameplay time and to get some scenes, it is necessary to fulfill the mini games.
Difficulty: Due to its size and number of quests, many players end up getting lost in the game, not knowing how to proceed in the story.
However, these small details, are not able to lower quality of the game, it certainly deserves 9 or 10 of note.