The game is great so far, but I noticed one weird thing. Lust Doll's arousal always stays at the same level if you don't do any activities, that increase/decrease it. You know, if your little buddy is constantly erected, you should probably go to doctor. So, what I am suggesting is making arousal decrease over time. Like, if your arousal level got increased, it would stay on the same level for like 20-30 turns and then start decreasing at a rate of, lets say, -1 arousal/turn.
Apart from that, this game is actually one of the best porn games I've played and it's definetely stands out from all those RenPy anime novels. Can't wait to see what will become of this game in the future.