Should Girls Basketball Players work on Flashy Moves?

If a player desires to play at the collegiate level, I would recommend that she watches womens college basketball games. Make sure to have a pen and paper available to write down how many times you see a player throw a behind the back pass or a pass between the legs or an AND 1 move.
You will very rarely see a college player do something fancy or flashy. As a matter of fact, I played collegiate basketball with a player that loved to be flashy, especially throwing no look passes. No one on the team ever saw them coming and it lead to turnovers. And Coach demanded that she stopped.
So should you work on flashy moves? Absolutely not. Keep it simple and work on the basics.