I'm not even close to finishing this but I wanted to leave some thoughts since it's definitely a game I'll keep returning to for a while. Like others have mentioned, this isn't as cohesive as Yume Nikki, and the dream worlds can definitely vary in quality, but man does this game creep into my mind like no other. Yume 2kki is in equal parts soothing, and unsettling; for as many weird, abstract, creepy, and bizarre dream worlds there are, there's always a calming, meditative, and comforting dream world spread throughout the journey, many being the light at the end of the tunnel, but nevertheless, while the dream worlds can be extremely different from each other, I always get a sense of melancholy throughout my journey; it can be very faint, but it's always there. Maybe it's because the main character is always by their lonesome, but either way, I can't help but get lost in that feeling, just like how I get lost while exploring the endless depths of the dreamscape. Even when I shamefully looked up the location of a specific wallpaper I wanted to collect, I couldn't help but stray from that straightforward path anyway, it was borderline irresistibile; that's when I knew that this game was special. The exploration in 2kki is almost unparalleled. It might not have the cohesive atmosphere or hidden narrative you could theorize about in Yume Nikki, but as a collective of many peoples' ongoing efforts, It is undoubtedly special, and I can't help but find it beautiful