*Casts Raise on the thread*
You're kind of missing something. He doesn't mean the script in the game, he means the script as in the plot or screenplay. While some games are made up as they go along, it's often a good idea to lay things out beforehand. If you think of your sprites as actors, you'll see that before they can act they'll need something to perform- the story of your game. Lay out your roles and events, then figure out how to fill them. Who goes where, what happens, what do they say? What happens in each scene?
Mind you I don't always follow my own advice... but I should.
Everyone has the right to be himself; wise men know how to,when, and whether to navigate the boundary between their rights and those of others when they collide.