Amazing hidden gem: pace, art direction, gameplay, soundtrack, characters, story - everything constantly flirts with a minimalist Zen perfection. Blindness is an all-pervasive white, from which the world comes into being and into which it fades to nothingness at each step you take, trembling in gentle aquarelles as an unique emotional, heart-wrenching story gently unfold

It's in the title. Approximately 2 to 3 hours of gameplay with ridiculously low movement speed. As they haven't fixed that yet, I can't give the game a full recommendation.
The idea in itself - a young, blind girl discovering the world and the player getting tricked by sounds and visuals, getting a visual representation of what it might feel to be blind, stumbling slowly though a neverending stream of new discoveries, fears and misimaginations is, in my book, well-executed. The price is a tad high, but worth it for a beautiful, colorful experience - although you might want to mod the game's speed a little, it gets really, really frustrating after some time, especially because you often stumble into the wrong direction.