Five stars... game play is good, though the physics could have been a bit smoother. The brilliance in the game lies in its subtle completeness. The music, graphics, controls, etc. are all complementary in simplicity, which allows the player more opportunity to pay attention to the story. Tragic, yes, but also intensely beautiful and thought-provoking.
I'm not sure exactly how to comment on it... not so much a game as an experience... I would have liked perhaps a cheesy scene at the end where, with 1st person point of view, your eyes open and you see the hospital room and the sister, but drawing the sister would have taken away the feeling of the experience being personal, so idk. Still, awesome game.