So all those 'adult' bits were bewilderingly unconvincing, when it wouldn't have taken much to make them more real. However the front-garden-and-bedroom world of a kid was powerfully conveyed I thought. The little but important dramas of being a child - wanting friends, being scared of dad, hiding crayons - were conveyed strongly, in contrast to the adult stories. Good non-humanoid alien too, the metaphorical child-eye-view - It feels like it takes forever to grow up, you are travelling through a void, you pass the time by playing, you need company.
I wish they'd done more with the animated moving picture thing. I was hoping you would see a crayon sketch of David Tennant, screaming out of a bit of paper.