This game honestly deserve five stars due to it's enticing game play. Like everyone have said already, it's got a lot of potential, I've seen some of the author's blog posts about future plans for the game and I gotta say, I like the spartacus esque aesthetic about this game and I hope to see a lot more content in the next update.
comment about Dialogue:
I noted that the developer simplified the dialogue of slaves due to their random nature, I do hope there will be interesting dialogue in the future for characters and such. I like that the game will go into more of a story mode instead of a sandbox like style of gameplay.
Suggestion and ideas
Not sure whether you've considered that you should consider giving the players the power to potentially enslave anyone from the game later on. I personally found having the power to enslave people into servitude after defeating them was a brilliant and satisfying mechanic. Think of having the power to enslave: wealthy nobles and magistrates, barbarian leaders, etc.