First lets look at your lines and color. Lines are nice clean and smooth though out. Color is bold but simple as well making good impact on the whole picture it self. Now the shadowing, which that is nice though i think that more shadow on some of the buildings in my opinion but over all you did well. The background/scene is well made. it give me the idea that the character (the girl) is running away from someone to her freedom almost and as she is running she shoot them. the picture and the title of it fit greatly. your have done a great job at making this piece of art. keep it up.
Great work. The only thing that bothers me is that she's not holding the gun in her right hand correctly. The hole towards the back is meant for the thumb. It's a more ergonomic handgrip design than most other firearms.