As far as capturing the feeling of "Papers, Please but Hololive", you all did great. Although I will say that gameplay-wise that's not even that challenging at all if it's just a straight up clone of Papers, Please. That said, it still does well in that making it about standing in line for a con makes for a pretty good parody of Papers, Please anyway. The cameo appearances are pretty good too. Those were funny.
My main criticisms with this game lie in how too close aspects of it was to Papers, Please. They're minor details, like the sprite for the crowd or the main theme getting blatantly ripped off. Small things that I felt would not have been too hard to make into your own (although, I can still forgive the song part if none of you can make music; a better compromise would maybe have been to just adapt a Hololive song, since yall went through the trouble anyway of redoing the Papers, Please main theme).
I'm sure you've been told several times in the other comments that the collision detection area for picking up the ID and ticket is a little jank. I think it's concentrated in the middle and you can't pick up the cards around the edge. The stamp's collision is also so far up where the handle is and maybe a little too small. Anyway, what I mean is that you have to be too precise to do anything a the workstation. Minor bug maybe(?) with how out of 30mins of gameplay, only 3 people had wrong details on their cards (and one of them was even scripted, so really it was just 2). I don't know if that was a message that Hololive con goers are all honest and upstanding people who wouldn't try to fake documents to sneak into a Hololive convention. Also in one of the days Kronii was standing in the booth, but as the roll-up shade went up Kronii immediately walked out without saying anything. That may have been an event and it might have been bugged into ending prematurely.
Anyway, fun idea for a game—adapting someone's fan animation into a fan game. Works for the most part. Good job to everyone involved.