Tried the demo, it's not bad, just a little difficult after the second quest. Essentially, you're expected to work within the brothel, but... the problem is you need a male slave for that to work, but none are sold, so you're effectively just losing and get the usual game over. I'd recommend waiting until a bit more is added.
Also, for any wondering how to make money at the start, focus on buy slaves with high power (just 1 power slave) and a hammer from the market. From there, it's just watching the money roll in until you have enough to do the same again, and when you're doing 4000 damage per night, switch it up to the materials that net you 22000 once cracked. Making money is easy once you get a good start.