So here are a few thoughts:
For the gameplay this is one of the best Wii games I've played. The motion controls were amazing and I loved the use of the speaker on the Wii remote, most other games only have dings or simple noises coming out. It sure was freaky the first time I heard "I need you daddy" coming from the remote. The puzzles and exploring was really well done, I did have trouble with the chase parts, I keep getting lost and turned around.
On the story, lots of spoilers:
Most of the game, I though Cheryl was older, but Harry lost his memories and just though she was still young. My guess was that something happened to her in High School, like the movie Carrie.
Also, did the whole thing with Harry actually happen? I'm thinking everyone but young Dahlia was real. The other thing I don't really understand is the significance of the Ice? Is it kind of like Dante's Inferno where the lowest circle of hell is frozen in ice because those in it are separated from God, similar to how Cheryl is separated from her dad or did I miss something?
I'll have to go through again and find more phone messages. I would definitely like a sequel to this game.