An exceptionally good looking piece of art. In this game we control the girl who is obliviously depressed and tries to cope with it. Hints and achievements (5 stages) tell us that she has either lost someone or dying herself. Our final goal is to get her out of the depression, building a star bridge made of good memories and her own talents.
That might have been a deep and emotional game... except it isn't. Don't get me wrong, I liked it a lot. But the game is way too naive. Probably, it is hard or even impossible to fit thorough analysis of such a complicated emotional state as loosing someone (bitter grief + guilt + regrets + thought of what is to come next + existential shock, "I am mortal too" + hopelessness + ...) into a platform game. I don't know.
Instead of an experience that digs deep into the soul, people who lost someone have a hand on their shoulder saying "Head up, bud. I know what you feel, I'm sorry about your loss. The one you lost would be happy to see you happy, think of how your memories of them helps you", and others get meditative, somewhat sad experience. It's not bad... but it's not great either.
Buy this game if you want to play a very beautiful platform quest with good sound design, diverse puzzles, and good story behind. But don't expect more.
Totally recommend GRIS.