Here's the second composition from my vizdev class. You can see the thumbnail that originated the idea, the tone thumbnail, the color thumbnail and the final composition. I had this idea about Jack being chased by the Giant at a staircase. While Jack is trying to climb up the huge steps, the Giant is climbing up the floors with his long limbs, like a spider.
Jack is in the foreground with dark tones and thicker lines. The Giant is in the middle ground with normal colors. The background is more diluted and warmer to give a better sense of depth.
Here's the sketch that originated the idea.