Man, what a shame. This had great animations, and femdom, two things I enjoy. But the dick castration thing makes everything go soft, man. This is a combo that just doesn't work. It's not just niche - it's hyper-niche.
I highly doubt that most people into femdom are also into castration. That not only fails to make any sense, but it's generalization in the least logical direction possible. There's a reason this type of content is so rare - it's because most people don't enjoy it.
Best of luck to the dev, I look forward to your future works, without the guro content.