The game is pretty good, go play it. It's very hard, but the game's last week, which combines various effects from previous boss fights, is genuinely one of the hardest thing I've ever beaten. You must be very good at micromanaging and management games in general to beat it. The story is pretty touching, but even explaining anything about it it would spoil the experience for you. This game received two sequels: Library of Ruina, a direct sequel which happens directly after the events of this game and Limbus Company, which is more of a spinoff and happens unspecified time after this game.