The title gives the poem its twist. "Misfortune cookie" borrows the idea of a fortune cookie, that small, cheerful slip of paper with a promise inside, and flips it into something cruel. The message here is two short lines: don't play hide and seek, because no one will bother to look for you.
What makes it sting is the way it takes a children's game and turns it into a statement about loneliness. Hide and seek only works if someone cares enough to search. The speaker seems to be thinking about being unwanted, or at least feeling that way, and the advice is delivered flatly, almost like a joke. That deadpan tone is part of the pain.
The signature "Fallen angel" adds another layer. It hints at someone who once felt lifted up and now feels cast down, though the poem doesn't spell this out. The mood is bleak, dry, and quietly sad, with a bitter humor underneath.