The filmmakers intended to elicit sympathy for the main character Lucy and create tension. They achieved this by portraying Lucy as vulnerable and using sound effects and camera angles without excessive gore. They researched similar genres for inspiration and chose to focus on a young female protagonist to appeal to that audience. Feedback was used to add tension-building elements like heavy breathing and heartbeat sounds. However, omitting the death of Lucy's mother made the plot confusing for viewers without context. Future improvements could show that key scene and alter the film's color and graphics.