"One-note" might be the best term to describe it. The setting and premise both had been copied ad nauseum before this game was released and they have continued to be up to this day, so don't expect to be blown away by the little bits of story you're given.
The RPG elements are as undercooked as you'd expect from the average title in the first few generations of the genre. By that i mean that there's not much strategy involved in battling or equipping your characters. The only armor or weapons that have any special quirks are acquired in the late game, only available for the MC and with such adverse effects that they're just not worth it, making it so you just buy whichever one makes your defense or attack a little higher. The combat, equally as simple, consists of attacking with your three characters and once in a while attacking with two characters a casting a spell with either #2 or #3.
Every section of the labyrinth is 30x30, so the exploration never really picks up in scale, it only becomes marginally more complex in the last levels due to the holes on the ground. Otherwise than that the layouts are really uninspired, so much so that this game on its own made understand how a dungeon's design can be uninspired. Despite a lot of corners, turns and dead ends, when you rethread ground you've already map you'll realize there's only one actual path to most points of actual interest. The last two levels even drop any pretense of complexity and just present a spiral design and long corridors with literally nothing, respectively. Only three items let you take shortcuts inside the labyrinth, but you'll notice that even the warp medallion has very burdensome rules attached to it.

You might think that i hated this game, but no, it was just... meh. If you have a vague interest in dungeon crawlers that you'd like to dig deeper into i'd reccomend more playing King's Field 1