Welcome to the forum, Tenorek.
I also liked the demo. It was a little heavy on the hack and slash, but there was enough humor and a few quests in town to show it wasn't just an action RPG. The existential skeletons sealed the deal.
Another thing that stood out right away was the world interactivity. Stuff stayed where you put it, and you could collect chests, etc to organize your loot. If there was a pile of rocks, etc, then there was a chance they could be covering something of interest. I tried the demo for an action RPG some time after finishing DD, which had better graphics. However, almost all of the chests were simply painted onto the background, and could not be opened. I got to one point exploring town where there was a pentagram in a house with candles at each point. Immediately I tried to light the candles to see if that would summon something or trigger some event, but they could not be interacted with. After that I just quit the demo and uninstalled it.
