Ender Wiggin is complex. His intellect seems to have debates with his own heart. Although family is important to him, he loves the challenge of the "games" submitted to him by the International Military Fleet. Teenagers. Adolescence. The fate of the world put in the hands of those who shouldn't be ready for this level of responsibility. Out of all the human ingenuity, innovation, and experience, the baton is passed from the adults to those who lack it even more.
There is nothing wrong with intelligence or having the ability to amass a wealth of knowledge. However, without wisdom, intelligence can be used as a means to the wrong ends. The adults were supposed to know better, but they did not.
Veterans like Harrison Ford, Viola Davis, and Ben Kingsley held their own. Yet, there seemed to be a lack of chemistry or an unintentional disconnect between them. Ender (played with class by Asa Butterfield) is a strong enough actor to hold the audience's attention. His fellow mates, including Hailee Steinfeld and Aramis Knight, worked well with Ender and the rest of the group. Only the strange fact remains: a group so young would be given the keys to so much.
The special effects were amazing. The set designs were creative on a large scale. The "battle sequences" between teams in training were thought out beautifully. A futuristic style of "Laser Tag" comes to mind. The battle sequence at the opening of the film is legendary, the likes of which have not been seen since "Independence Day."
It is disturbing to see that video games were used to teach the younger generation how to destroy and kill things in real life. Perhaps, that was the point the writers wanted to highlight. Along with the fact that winning, at any cost, should not be seen as the most important aspect of life. Ender said it himself: how you win is also important.
The ultimate battle between the kids and the alien race never really took place the way one may have expected. When the most climatic moment came alive, this awesome battle, the audience was none the wiser. In a way, it's brilliant. In the end, it can be disappointing.
Unfortunately, the swap of responsibility in dealing with a problem of this magnitude, from the adults to the children, made it harder for this viewer to suspend disbelief and forget that this is just a movie. The grown-ups, the ones who are supposed to be protecting and fighting for the next generation, sent the next generation out into the universe to do the dirty work for them. Yet again, this may have been written intentionally with this point in mind. Something "is" wrong here and society has to make sure it does not happen in reality.