To write summary of this, you need to talk about how these children tried to survive the terrible life in the forest. This is because their life was all about challenges and especially from the fear of being eaten by the cannibalistic witch. Get more information on http://ivyjoy.com/fables/hansel.html.
Mind you, this is my opinion of the movie, but you could state that it was just another over-rated splatter movie from Hollywood, produced in an attempt to destroy the well loved children's story of the same name. As of late, many of Hollywood's releases have been seen as a heartless attempt to rub the noses of the public in the fact that they believe they weren't any part of the problem in the recent mass shootings in America. Just as the media blitz around violent video games being part of the problem as well, was starting to gain some traction. You be your own judge, I've already made my opinions known.
My favorite comment about "Hansel & Gretel" comes from an episode of "Sex & the City." It was about building your life as a female adult & then children consume everything that you built. Raising children is a serious committment of time, $, & personal parental education that hardly anyone perceives since it would seem that actual parenting isn't taught in schools. We certainly wouldn't have so many single parent households if the enormity of the task were exposed. & maybe people should read the ORIGINAL Grimms Brothers stories. It's amazing how sanitized those actual writings became to morph into children's stories!