So there's a LOT of issues, I'm only going to cover the mains ones so I can avoid writing a essay.
Being greeted by a "Authorization menu" whilst starting a game has to be one of the most annoying things you can do, but it doesn't stop there, it the proceeds to take you to a page were you can see what you're missing. Things like this from creators will never never get my support. Not to mention that this locks content behind a paywall in a game that has barely any content at all. How are you gonna release whats basically a demo at this point, and have half of the demo behind a paywall? This isn't how you get support early on.
A lack of a free camera is concerning, especially considering this is Unity. Being locked to only being able to move my head up and down, somehow makes even me, someone who has no issue with close spaces or being confined claustrophobic.
Uh what can I say, the cat girl model is really bad (Succubus looks ok). She looks like a man with a wig. Also as blazerules said, a pair of put on paws and a tail makes for a very disappointing cat girl. Its almost like some low tier roleplay getup.
The running animation, is uh, yeah not good.
The cross eyes during the succubus sex scenes is horrifying, i'm gonna assume you were going for ahegao, but when the mouth remain stationary it gives off more of a OD vibe. Also how in the hell are her teeth whiter then her Sclera? Her Sclera should not be tan.
I hope you don't take this as senseless hate and immediately shut down.