Oh boy, you missed a lot of important facts that would change your expectations haha
As you've noticed, this game is quite old at this point...and it hasnt really moved beyond what you're seeing for 4-5 years now?
Like, we can argue about levels and enemies being added (about 1.5 enemy per year? xD) but mechanically, this is still the same technical pre-alpha demo we've seen in 2020 (I'll be generous not to include 2019 because on Kemono you can see that they still changed something by the end of the year back then).
It is going the same route as "A Sorceress' Tale" by Mithos56, who is milking support since 2016 while still being in pre-alpha.
It is still a barebones fighting game with literally nothing to make it interesting beyond high quality sex animations (but if animations are all you're after, don't you want to support Gifdozer and other directly for their SFM work?).
Though even on that front we have seen a whole drama unfolding - since rape and bestiality is a big no-no on general crowdfunding like Patreon, which resulted in self-censorship (done in the most bizarre way possible) and then it was still banned from Patreon because bug enemy CANNOT GIVE CONSENT xD (plus some worries brought up to Patreon staff about the promised content being delayed and stuff).
EDIT: btw, check out this article from late 2018 -
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Pure Onyx was supposed to be a "quick, side project" to support an already abandoned MATM game.
I can't make this up