Man, I loved the atmosphere of this game. Not because I like sad stories, but because everything fit together so well. The music, the graphics, and the flow all portrayed a melancholy bittersweetness that ended on the same note.
It also shows, albeit simply, how the sibling of a dead/missing child can be neglected by the parents, because of the intense grief. Such a tragic circumstance to happen to any family.
Game side, the puzzles were great (I also loved the shadow puzzle), although the ghost who changes the sandbox items needs to bug off ;).
All in all, a great experience. Wished it was longer, but it was amazing as it was.