This game is good, but I will not play any future updates.
Feedback:
This is a fetish game based on obscenely and impractically large breasts. From a psychological point of view, for the game to be successful, it should stay away from an overabundant or overexposure to the same body style or feature. And fetishes, despite what people may think, rarely gain a wide audience's sustainable interest for long.
Therefore, you limit your audience.
Take this simple test.
Model a girl with large breasts (like the size in your game). Then model the same girl with well-proportioned breasts to the rest of her body (not too big, not too small). For good measure, model the same girl with small breasts.
You will find out that a small number of people will gravitate towards large or small breasts, but everyone will find it challenging to stay away from the well-proportioned one. They will even start fantasizing that they wish they had that type of woman in their real life all of the time.
Note: Large breasts rarely have perfect nipples. They often have large areolas and flat, stretched-out nipples.
It would seems that the authors or people with these kinds of fetishes have never been with a woman with extraordinarily large features. If they did, they would know that large breast, though exciting at first, becomes a nuisance after having sex over and over.
And if you would disagree (which I'm sure some will), take a statistical look at all of the successful game franchises and ask yourself why those games have a high success rate. The answer is simple. They keep it balanced between fetishes and fantasy.
Final Note
Please consider changing the text box area to something less ... "fuzzy." It does not give a clean feel to the game, as the rest of the graphics already have a sort of haze. This makes it difficult for the readers to pay attention to either the story or the girls. Perhaps instead of a brown outline of the text, go straight black and 1pt.