There were some inconsistencies in the narrative voice that bothered me. 
 And the middle parts were annoying because I've read sci-fi before so the "I'm such a stranger to what passes as humanity" bits were not novel or cute. 
 But the child's voice was done well and often framed the content in such a double-whammy of innocence (kid plus outsider to humanity) that had me laughing out loud. 
 Jacky's journey was neat, but I was much more interested in Ma and Grandma. They had more severe and, arguably, "real" reactions to the ordeal. 
 Good story in all!