The so called "Campaign" is just one single map that has a 5+ hour playtime...

This isn't really a dungeon simulator. It's a village simulator where some of your villagers happen to be orcs, goblins, or trolls.

A dungeon simulator is about creating a gauntlet to defeat invading heroes. This game doesn't work that way; mostly what happens is that the invaders set off an alarm, and the local squad of guards shows up to fight them. The heroes politely wait around for the guards if they set off an alarm, so there are no issues of, say, catching the heroes before they can reach you vaults. Alarms are 100% effective.

Mostly it's about pitting the heroes against your guard squads. While you can eventually build traps in this game, it's extremely counterproductive to do more than a few, because your subjects will constantly trigger them if they move past them. You only want the traps in entry areas where your subjects don't have any reason to venture.

While you do get money for defeating heroes, invasions are too rare to count on for income. Instead your income is your tavern and sales of simple manufactured goods. Yeah, a "dungeon" having a thriving tavern is weird, but the tavern makes sense if you think of it as a village, not a dungeon.

Unfortunately, it's a thoroughly mediocre village simulator. You provide food, sleeping quarters, and recreation, and you're set. There are no production chains, goblins make generic tools out of nothing, and dwarves make generic weapons out of nothing.

Some aspects of the game have pointless busywork for the player. For example, you can torture prisoners, but you're supposed to stop torturing them just before they die and release them. No, that doesn't make sense, but that's what the game wants you to do. You can't tell your minions to do this automatically, you have to keep an eye on the prisoners periodically, checking if they're "done" yet.

In the same vein, there's a demon that will periodically kill one of your minions if you don't sacrifice a minion often enough. You have to periodically check on the demon's patience meter to see when it's time to sacrifice a low-value minion to avoid losing a good one. Checking this meter is pointless tedium.

There are some user interface issues. For example, to launch a raid using some of your guards, you need enough Intelligence points gained through spying to pay for the raid. There's no on-screen meter showing how many Intelligence points you've gathered, so you have to periodically check this by clicking on a cabinet that stores these, to see if you have enough yet.

The campaign has some very heavy-handed humor. It's very broad, and not funny enough to raise a smile, let alone a laugh. Mostly it's about mocking your minions for being stupid.

The game is awfully easy, and there's a large number of rooms to unlock, but even after you've unlocked everything it's so simplistic it's not worth your time.

I found the Gameconcept quiet intersting, so I bought it. When I first played it I found it quiet frustrating to deal with balancing the money. After the realisation hit me that the relics have use and ar not just decoration the game got easier.
I wisch there were the psoibility to toogle rooms to specitci races, eg. a bathroom toggeld so only elfs would use it.