Below, you'll see any text that was highlighted with comments from the reviewer.
I think the opening paragraph is well written and explains your ideas about the movie clearly and concisely. I think a creative title would grab the reader's attention even more. A lot of movie review titles are pun-based, but anything that gives a bit of a description for the movie works. Another successful way movie review writer's catch attention is by using a memorable quote, such as, for this movie, "I love you, but you don't know what you're talking about." (Just as an example) Because you don't think Anderson did the best job of fleshing out his characters, you could relate the quote to the fact that he doesn't know how to develop his characters.
I can definitely tell that you did your research on film writing and the review terms. I feel like you got inside Anderson's head and interpreted what he meant for each part the movie to mean, and you did it well. I also think you did a good job of analyzing the film and pointing out the flaws without turning viewers off to watching the film. I think if I had read this before seeing the movie, I would have thought more about the acting and plot construction than if I hadn't read your review.
I thought everything was well supported and understandable. I didn't understand was what "deus ex machina" means, but I'm not up on film jargon. I wanted more detail on what you meant by the "symmetry" of the film as well.
I really enjoyed reading this! Moonrise Kingdom is one of my favorite movies (I had actually started a review on it for this contest before deciding not to enter, which I thought was a funny coincidence). That being said, I liked your review a lot and gave me a different perspective on the movie. I think you've got a great review here, the only thing I suggest working on is the title and maybe an additional opener, although I like the way the rest of your opening paragraph is now.
Good luck in the competition! :)