Not bad for early access. But as of now, this game is still incomplete. The female lead needs to be fleshed out more and there is not any sort of ending at the moment. At least this is what I saw in my playthrough, for as a previous post pointed out, there is no way to know for sure if one has reached the end of the current content.
I have bought and used all the items from the market. One more planet remains to be explored. I have met the historically inaccurate Sun Tzu and fucked the Egyptian Pharaoh. And I guess this is it.
All in all, historical inaccuracies aside, this game provides a satisfying experience. And, given that it is a porn game after all, even the inaccuracies are fun on some level.