Surely, you will learn what this game is. It's hard to describe and I don't have words for it. So I won't even try. As the second entry in a series of games where you place Badman in a dungeon of your creation and you try to defend him by building it correctly.
There is a whole ecosystem to this game and getting set up correctly takes a great strategy. I for one am terrible at planning these kinds of things, so I never completed all the story based missions. Sure it is fun to see what happens when you get a good dungeon going and see it eat heroes alive but when you lose, you usually lose in a bad way.
Is this game fun? I had some fun with it. Not my style of game but I gave it a chance and at least had some fun with it. If you like what I described, pick it up. Pick up the first game and I believe there is a third game in the series but I never played that one.