Tried it out. Thought it was pretty decent. As expected, the art didn't really bother me.
I think Anna's needs some work, though. Whereas the other characters have an outline, she doesn't seem to, she's more just a blob of colors. The futa was very hot, and so was the cellmate, but I'd also put a bit more effort into the dirt on the feet if I were you.
Otherwise, as far as art is concerned, no huge complaints. If the rest of the game was drawn like this I don't think I'd care.
Hoping to see more from ya.