A fun filled family fantasy movie reminiscent of those wonderful matinees from years ago such as The Lost World (1960) and Jason & The Argonauts (1963), and in similar vein to Zombieland (2009), with a tongue-in-cheek adventure story full of those scary thrills that appeals to the young and the young at heart. The story here is that the multiple missiles fired to destroy an approaching asteroid resulted in radiation fallout contaminating the world and causing insects, amphibians etc to mutate into giant monsters. Survivors have fled to various ramshackle bunkers and seven years after the event hapless Joel (Dylan O'Brien) yearns to see his former girlfriend Aimee (Jessica Henwick) who is 85 hazardous miles away. With hopeless survival skills Joel heads off to find her. The film is funny and has a central hero who shrugs his way through the dangers barely making it each time when he is pursued by various creatures all of which are superbly constructed with CGI. O'Brien plays the part of a lovesick fool just right mixing accidental heroics with utter hopelessness. There's a cute dog thrown in just to make it all the more appealing. Like with most apocalyptic narratives it turns out its the humans who are the most dangerous. Michael Rooker has a cameo in this entertaining little film that's just right for family viewing.