So I just finished v0.04 and it is so far one of the best VN I've played. The attention to detail is superb as well - nothing in the game felt rushed or half-baked.
Where many VN fail in keeping dialogue interesting and only using it as a filler or a segue from one sex scene to the next, this game has a carefully planned and believable story that you actually want to read.
The characters are likable and pretty as well, with a decent variety of body types, height, breast sizes and so on - although I'm hoping for a bit more variety in pubic hair, labia sizes, skin color, etc, in future releases as new girls will be introduced. That being said, the variety of girls here are on-par, if not better, than what you'll find in your typical VN.
I personally don't mind the puzzle mechanic being part of the game, I just think they should've been implemented differently. In other VNs that I've played, they are mostly used to unlock bonus content, such as an alternative outfit you can toggle in a scene, a gallery picture, etc. While it is possible to play the game in "story mode" where puzzles are completely disabled, and without being able to turn them off mid-game, it's impossible to know how difficult the puzzles will be when you've just launched the game the very first time. A puzzle that takes a minute or two to complete is probably fine, but some of these puzzles can take up to an hour to complete... I hope this is changed in future - perhaps with a free hint every so often, or making the hard puzzles only for bonus content, etc.
The game is still quite early in it's development, but still took me a few hours to complete. There is a way to replay past "daydreaming" scenes, but not the other scenes (yet!).
Overall, while this game has a few minor inconveniences and a few missing features, the quality of everything from art to story, makes this one of the better VN I've played in a good while - and with a massive potential!