Do you need to reinforce or reduce the idea of stability? Long parallel lines are stable. Throw in some diagonals to increase threat, movement, or tension.
How are your large shapes communicating the story? Do you need to move characters closer to the camera to induce empathy in the viewer? Tilt the character to make them less stable and off-balance? Or the opposite, to make them more stable and strong? Do you need to make the world bigger and scarier, swallowing …
Are you silhouettes clear? If you tint your subject black, is everything still recognizable and distinctive?
Do you need to really draw the viewer’s focus into one area? Use a frame within a frame – an enclosed shape within your composition that frames the most important element. This will draw focus, de-emphasizing the rest of the frame.
What should the viewer be looking at? How can you get them to look at it?
Do you need to adjust the size of your character? Increase the amount of space the character takes up to increase that character’s importance. To make a character small and/or vulnerable, or to increase how big their world is, make them very small in the frame. A low angle can make them seem commanding or …
Look at the image from a distance. Consider the dark shapes as rocks, and the shite space as a river. Is water flowing through the river well? Are there any choke points or awkward shapes?
Look at the image from a distance. Consider the dark shapes as holes instead of objects. Is the white space interesting and dynamic? Rearrange the shapes.
Do I need to add life and movement? Add a cloud of butterflies, or sky whales, or something?
Do you need more shape contrast? Value contrast?