I did finally come back to this, the game might not be 100% for me, but your art is too good to not at least get to the giantess part.
I got to be honest, the giantess fight has to be the least fun thing I have ever played in a video game. It's like the worst of RNG and VN simple fights. I though I had to be doing it wrong until I found the earlier comment saying that using the back button was actually the way to do it.
I would suggest reworking it to be more of an actual fight or more likely just a more set selection of choices, especially since there is only one path that actually progresses. The fact you only have two choices and both can be wrong is beyond frustrating. having it be pure RNG when by this point there is nothing you can do to have improved your chances is an odd choice that only effect on the story is going to be whether or not people actually decide to deal with it or stop playing.
That said I love the art, and while the huge prey focus isn't for me I enjoyed a few parts of it, highlights being the giantess herself and the ending to the current part at the lake. I hope in future updates the is more descriptions about what content is actually added, I don't think I can take another slog through that much prey cowering to get to a single pred scene again.