Gave the demo a try. I certainly do like the aesthetic, and the succubus has a nice design and voice.
It being in first POV, as it should, is an interesting choice that I have mixed feelings on. Only HEARING what is happening to your character is interesting, but I also kind of wish you had a better idea of what was happening.
I did like hearing the SFX of, presumably, you lose because your (presumably female) protagonist cums and is out of the game.
I have mixed feelings on if it would be nice if you could see some kind of details of your player character in some way, even in a first person perspective. Like a mirror or something, since you do lose some of the 'fun' when you can't see the kind of things that happen to you.