This is probably my favourite for the aesthetics category, out of all the games I've played so far. The muzak, the mix of sprites and low-fi 3d, the nonsense signs, the sheer grossness of the place. You've done an excellent job here. I liked the writing as well, it implies some supernatural aspects to the mall, but... even a regular decaying mall is pretty creepy. It's an interesting mix.
(Where I live, some train stations have shopping passages in the underground parts. Playing this, I was thinking - yeah, pretty much.)