It's shaping up to be their best game yet. It's artistically gorgeous while remaining stylistically familiar to Witch and Fairy. I'm also a big fan of the sound design, as usual in these games, from the ambience of running water or waves to the calming music to the cute moans and lewd sex squelches. It's all here and done better than most games on this site.
The porn is thematically the same, with strong themes of futa and corruption in the human characters and diversity in the beast content. In terms of quality, the animations are the best yet, the additional geometric plane gives every scene a little more depth. Also, because you take no damage in the animations, the H-Content will not immediately give you a game over, which is a fantastic change.
Despite the switch from platformer to isometric, it plays familiarly and still has all the trappings of the original, good and bad. You'll probably want to change the controls as soon as you start, sprint to shift, jump to space, etc, but once you've got the controls down it's a breeze. (You can use an image translator to figure out the Japanese language control mapping menu)
My only major complaint is the lack of i-frames after taking a hit or recovering from the downed state. Additionally, the demo is very short as it is now, but a lot more seems to be ready than what's available. I doubt we'll be waiting longer than half a year for the full release, maybe with larger demos in the coming months.