I enjoy your game a lot, my only complaint is that choices don't matter too much.
I will like to feel some danger with my choices from time to time, specially when I do a second playthrough.
Like, after becoming a couple, get an affection meter with Lily and depending on your choices she loves you more or gets angrier at you.
The affection meter could also decrease if you hide things from her, for example: If you have sex with another girl but you lie to her saying you were doing something else, she gets angry because you don't trust her.
But if you are honest and confess what you did, she accepts it and tries to show that she can make you feel better than the other girl.
If you keep hiding things from her, or being mean to her, she may want to teach you a lesson and find a male dog anthro to have sex with. Just to get back at you.
A "game over" or "bad ending" could be Lily getting pregnant by that male dog. But that can only happen if you're a complete asshole to her.
I will like to feel that my choices matter AT LEAST when it comes to Lily.
Keep the good work!