First, as unbiased an opinion as I can give, this game is pretty good. You've nailed the atmosphere and it's very unsettling, and it keeps you wondering what's happening. However, I would not have engaged with this game if I had ANY idea it was about CSA (just randomly came across it). I'm a victim of CSA and always read TWs, and this game was heavily triggering and upsetting to me, and the only warning was 'disturbing content.' PLEASE consider putting a more specific warning, even if it is 'the content of this game contains some heavy triggers related to CSA, so if you are a survivor, this may not be a good game for you.' I have to say too, despite giving props to the game, if your biggest twist/spoiler is 'it was CSA/SA,' then you might want to reconsider how you've handled the subject matter. CSA/SA is not a good 'shocker twist' for a horror game, but it CAN be included in the story sensitively and well. Maybe a story where we get heavier inklings of what's happening, and have a clear ending where the victim escapes? A good ending for them (apologies if this is one of the endings, but I have no desire to find out for the sake of my MH).
That said, I also realize I don't know the dev, I have no idea what they may or may not have been through in life, but as someone with heavy traumas who is also a creator (I write books about some pretty dark stuff), survivors still have a responsibility to handle certain subjects carefully when putting them out there for the general public in stuff like games and art, even if that just means a heavy and informative content warning.
I hope the dev takes a lot of the constructive criticism here to heart, and they continue to make games.