I think its similar with the Pig Game(3rd best rated game on the site), its just games of a certain sub genre(furry, futa, NTR) are usually low effort garbage, so when an above average game catering to their specific kink comes along they positive review bomb it. Don't know if its the case here, might be an mind-blowingly well written game in general, but I have a feeling that its inflated by futa fans not having a good alternative.
There is also the possibility the dev is an established artist, I remember when Yuno released his game(RIP) it got so many rave reviews people started accusing him of buying reviews, but it was mostly people that already liked the dev before his game.
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Will try it an give my honest opinion as someone that doesn't like these specific kinks if it holds up.