The Lovely Bones

I think Susie's father means that the penguin is trapped in a world with out any of the troubles in the world. Her father considers it perfect because of it is a world with out any troubles like sadness, hardship, and death. Susie feels like the penguin trapped in her perfect world a world she considers a little to perfect. Susie considers her world perfect but as she is their in her heaven she thinks it is a little to perfect. The kind of perfect you long for but when you get it after a while it becomes so perfect that you get sick of it and want to go back to the life that you had a before your life became perfect.