Great to see, that you expand upon the actual core gameplay again, which is the streaming situation.
I have some feedback, for your considaration. I hope you don't find it too nitpicky, but please hear me out. The way you depict the uterus atm, is more how it looks from the front (in the transverse plain). When you look at it from the side in the sagital plain, it has more of a pear shape and inserts from an upward 80掳 angle into the vagina. Note, that the vagina has even a small dead end behind the cervix (opening of uterus). The uterus is tucked around the bladder.
If you haven't already and are interested to study the subject of your art a little more, you could google "uterus anatomy sagital" or "...transverse" to see the differences. Alternatively this YouTube vid at this timestamp (/watch?v=J3oky60tXCc&t=393s) could be an easy start.
I'm usually not a fan of those internal angles, but thinking about it, I believe I'd find it hotter, the more it looked like the pixelated insides of a real woman and the less it looked like a doll cut in half.
-I think having the uterus depicted upwards could even serve as an indicator, of how "full" she is (like a thermometer in white). Maybe there is even opportunity for a mini game, in which more cum fills the uterus, the more aroused she is or dependend on the position, and more is spilled into the vagina and drips out the less aroused she is...?^^
-It might very well be work in progress, right now the opening of the vagina is just a pink mass without any labia. She is sensitive there.. :) On that note, I'd also appreciate if you gave the labia and that clitoris of hers in the normal external view a little more love, like you did with her nipples.
-I really like how you animate the squishiness of the tissues.. Looking at the anatomy I honestly think it would actually be sick, if you used your pixel magic, to animate as internal shot, how the penis pushes and bends a little against the front wall in that first bend of the rectum, hitting/squishing the vagina and finally the cervix through the anal wall, while sliding in deeper. That would set this whole project on another level for me. I have never seen anybody depict it like that. Why don't you let the players see and understand why she cums from anal all the time...? ;)
Ok, enough said. I hope my 2 cents have been useful to you in any way, because I think knowing more never hurts.
Do what you think is best. Your good at it.