This movie is remarkably intelligent and thought-provoking, with fantastic stylistic and visual elements. However, it deviates noticeably from what one might expect given its PG-13 rating. Here's a brief review. Christopher says, "Maybe this is our true nature." Richard responds, “That’s a profound thought.” I’ve seen over 100 reviews on IMDb—a forum similar to this one—criticizing 'Voyagers' for essentially being an outer space imitation of William Golding’s novel-turned-film, "Lord of the Flies" (1954). My response to that accusation follows. All directors and artists frequently draw inspiration from previous works, borrowing far more often than we readily acknowledge. It is not the same as plagiarism or theft. To those on IMDb who have harshly accused director Neil Burger—best known for "Divergent" (2014)—of this, I say: if William Golding could comment from beyond, he would likely praise this particular version of the “darkness-of-man’s-heart” theme, presented here as a large-scale cinematic thought experiment. The film's pointed critique of human nature and its study of how serious immorality can arise in any social setting is fascinating, even as a pure work of art. The young cast, led by Colin Farrell, delivers mostly subdued performances exceptionally well. Despite this, I must deduct a point from the film’s score because it's unsuitable for younger viewers; no reasonable parent would take a 13-year-old to see it—and that is not an overstatement. Furthermore, the movie should have been slightly longer to explore some key aspects of the story in more detail. Therefore, my final rating is 7.75 out of 10.

Source on TMDB