Younger audiences will likely have a good time watching "City of Ember" this weekend, Gil Kenan's family adventure about two teenagers who race against time to help the citizens of Ember escape before the city’s powerful generator breaks down and all the lights go out forever. Saoirse Ronan, Tim Robbins and Bill Murray star. Let's see what online critics have to say about the flick:

• Cinematical's Jette Kernion: "Caroline Thompson's script gives us strong main characters and entertaining supporting characters, but is a little light on story."

• Brian Orndorf at Collider: "'City of Ember' is a sci-fi fantasy film with forbidding apocalyptic overtones, extravagant set design, and an edge that mixes high-flying questing with significant ecological worry."

• Cinema Blend's Katey Rich: "Almost entirely humorless and derivative, despite its wonderfully inventive set, City of Ember is little more than a retread of the best movies the '80s had to offer."

• Ron Henriques at LatinoReview: "This is in fact a beautiful film to look at and a completely absorbing and realistic world that's stands ahead of some of the more recent and similar efforts in the genre."

• Chris Bumbray at Joblo: "Besides the excellent cast and some interesting production design, there’s not really a heck of a lot to recommend here."