It's a good start.Sadly it's only a combat demo (v4.1 might reasonably lead one to think that they were getting a little more than that...)
What you get is a VN type prologue, then you get to choose attack cards for the princess as she faces off against six opponents. She can try and kill them or, as they try and get a bit lewd with her, she starts getting options to tease them a bit.
Win or lose, the next fight starts off with the same initial pool of cards and the same enemies. Each fight turns into an attempt to get the princess stripped naked before she either dies or kills all her opponents. There are some interesting looking higher-level cards in the last screenshot, but I've never seen one in play, nor has there been any signs of the enemies getting more advanced. I think the princess' arousal state does carry over, and maybe if I'd played longer (or on an easier setting) maybe I'd have seen more.
Production wise, the renders are nice, but the UI is choppy. Could use some work on the optimization there, but that will hopefully come.
Overall, not bad. Needs something to do other than combat (which is on the TO DO list) and needs some sort of consequence for the princess n combat other than having her boobs or ass grabbed.
I'll check back in a release or two and maybe bump up the rating. It's got potential, but needs work.