Great writing! I've only recently 'discovered' visual novels with adult content and I've found a few diamonds in the rough. But this one really sets itself apart. The writing is so much more refined. The characters are people you hope exist in our cynical world.
The one thing I felt was a bit off was Cassian and Penny describing their relationship as a mother/son thing when they're very close in age. I have no problem with Penny being gay - there are no doubt plenty of people who would appreciate the representation. In a perfect world you could make her sexuality a choice and the story changes with that choice but that's another thousand hours and perhaps work for a team rather than a single person. Perhaps a compromise would be to make her bisexual - though the prologue really seems to set up a certain strength in her's and Leah's relationship, despite some lines to indicate that it's a fairly recently established relationship and not set in stone.
The amount of detail in the writing, giving the reader a glimpse into the life of a person with dwarfism, a person with ADHD/Autism .. plus characters talking about people and their motivations .. the story is almost a treatise in psychology and philosophy but it never gets dry.
I'll be looking forward to its continuation, and in the meantime I'll be checking out your other work. =)