Ask yourself these questions as you revise: Does my exposition give the reader enough information to understand what's going on? Do I make it clear who all the people in the story are? Do I describe the setting vividly? Do I provide enough background?
Does my rising action increase the tension? Am I sure that all the tension builds toward a climax?
Does the climax solve the central problem in the story in a satisfying way?
Do the falling action and conclusion show what happens after the climax? Do they avoid bringing in any new conflicts?
Does my pacing fit the action of the scene? Do my transitions signal changes in pacing?