Gameplay: you solve puzzles to unlock girls, they're pretty easy to solve, so they act more as speedbumps than anything else. Without them, this would be a scene gallery.
Plot: none. The only story you have is whatever the h-scene provides; all of the scenes are to be taken as isolated events without relation to the other ones. the most disappointing thing is that other than the girls having cat ears, there are no real "monster girl" elements found in the plot. If you were to remove the monster ears from the girls, the game h-scenes wouldn't change one bit.
Scenes: They're okay, nothing to write home about. The situations are very standard and vanilla, but it lacks the story that usually accompanies such scenes in other games.
The translation is utterly subpar.
Overall I wouldn't recommend this game to anyone; it's short and a waste of time. This is disappointing since I'm a major monster girl fan.