The first thing about this movie is that they tell you too much in the trailer, stuff that the protagonist won't know until well into the movie!
OK, so a young man wakes up and finds himself in the Glade, a patch of land surrounded by towering walls (and one exit). He joins a community of similar young men, all of whom have lost most of their memories, and don't know why they are there.
Beyond the walls is a scary place known as the Maze. The gate closes at night. Nobody has ever survived a night in the Maze…
That's the premise. As you can imagine, something nasty lives in the Maze. From a wargaming perspective, there's not enough variety of nasties, and the nasties are way overpowered compared to the young men.
The idea could be converted to a wargame campaign: the idea of a maze that must be solved (in more than one way!) to escape from the Glade, with the complication that as you come closer to the solution, the campaign becomes more dangerous…
It's also interesting because this is a sci-fi maze, not fantasy. Wargamers would want to give the characters some basic weapons, more monsters but easier to kill, and probably skip all the "factions" among the young men in the movie.
Worth seeing if you're a wargamer? Yes, and the special effects deserve seeing on the big screen.
Great movie? No. But pretty good, didn't bore me, several good performances. There's also a book it's based on.