The first panels have more rich and saturated colours to represent "present" time, then when it cuts to the girl's memories of the past, the colours become more pastelly and muted. As the stories goes on, her memories catch up to present day, and while this happens the colours slowly become more saturated. The older the memory, the more muted they are. The story takes place in an entire day. Near the end of the comic, it's night time and then the sun rises on a brand new day...
When the pages were complete, Steve would go over them and add lighting to the characters... hence why the characters are pretty flat.
The story is pretty dark, but there's a happy ending. It's about a girl who reflects on her life and remembers all her hard times and struggles she's been through. But in the end, she cleans up her act and makes amends with the people who have helped her along the way and is grateful for being a survivor and for the gift of life. Deeeeeep...
Ok, here ya go!