An empty town where life has moved on is read as a place, a role or a relationship that has been left behind. Dream tradition takes it as loneliness, and as a question about where your energy went.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.