This game is well above average for the point-and-click genre of games. It, like the sequel, weaves a beautiful story with beautiful artwork and music, and is well worth picking up ("Memoria" is the sequel and is also available on Steam). Like all of this genre, there are some things to figure out which aren't necessarily intuitive, which can be frustrating. This is no worse than any similar game, however, and didn't detract from my enjoyment of the game.
The interface and inventory are very easy to use, which is much appreciated in a land of complicated inventory management and skill systems and perplexing (at best) UIs. For this genre, less is more in terms of making a player jump through hoops to work the interface. This game does just fine at that.
I've heard others say that the story isn't anything unique, but as I've never run into a story quite like this before, I'll politely disagree. There are some of the usual fantasy game tropes, but the overall story felt brand new to me. At least personally, I felt it was a beautiful story with some parts that were heartbreaking (caveat: I am a softie, so I might be more emotionally invested in the story than some are!).
The characters were all nicely handled; I especially loved Nuri's simple naivete, which the writers made work nicely by not confusing simplicity with stupidity. She is not stupid, even when her innocence about the "human" world gets her into trouble, and even when her inclination towards trusting everyone works against her. "Your humans are angry with me, Geron!" she says after opening the cages of a town's entire animal population. Her bafflement is endearing.
The artistry of the scenery and backgrounds is what really impressed me through both of my plays through. The attention to detail and sheer beauty of some of the backdrop scenes really showed hard work on the part of the illustrators, and I respect that. I have some screenshots uploaded from this game just because there were parts I went full-on tourist with the camera.
TL;DR: one of my very favorite games of the genre, beautifully done in terms of character, art, and music, and well worth picking up, along with the sequel, Memoria.