Just play it on Itch so you don't have to download it, I think there's no kind of paywall or anything.
The game: I skipped the cutscenes and muted the squeaky anime voices, so I can't judge on that, but the game itself is fine, no real complaints other than maybe the game's art looking a little AI-ish despite there being a named Patreon artist who doesn't openly state they do AI art.
Anyway, it's a minigame ""sandbox"" that comes across as kind of an idle game, where you you play as a tentacle flesh pit trapping a succubus goat lady with AOM3 AI hair. You can do vaginal, anal, and do some breast groping. You can also forcibly change her breast size, turn her clit into a "dick" clit, and dress and undress her. Cumflation is an option, though it's more of a belly size slider with some flavor text on the side about her being a hyperbreeder instead of actually being tied to how much you cum into her.
There's two endings, very on-or-off in how you unlock them, one is earned by hitting the "ENDING" button when you haven't done everything yet, and the other is when you've unlocked everything and tried it all out. I wish it wasn't so black and white; you still get the first ending if she's a level 950287 mindbroken cumslut slave if you haven't maxed out her clit at least once.
Honestly though, neither ending has any special art or anything, you just do it for the fun of it, and both endings are fine, if really simple.
As a minigame, it's fine, you can beat it in like 20 minutes, and you'll get enough content to pad that out. I wish there was a little more freedom, but eh.