I've noticed that the people that enter borderland aren't happy with "our" world for various reason. Some even tend to find true happiness in Borderland saying they feel free for once in their lives. The way the contestants died in this episode was brutal, and worth the watch for those who have not seen it. As some have mentioned, the lead character in this episode is always calm and logical. I also noticed that Tokyo in Borderland is decaying and going back to the elements; I suppose that would be due to lack of people. Note: before Arisu and company came to Borderland, there were people who came before them; some of the people start working for the game and create their own games.
I have no idea where this is headed (I stopped here last night), but it is one of the most entertaining and riveting TV shows I have seen in a while.
The guy who is somewhat effeminate is one of my favorites because of his logic and brains; Arisu is more like a person who takes up for the little guy. The characters make you want them to survive!