The prompts are pictures this year, and here are the ones I used and how I interpreted them:
I took the person on the double-sided arrow as a ghost; someone in limbo. Alternately, as a representation of people precariously poised between success and failure, good and evil.
I took the skull with a snowflake embedded in its cranium fairly literally, to evoke winter, stasis, and death.
I took the worm exploding out of the apple to represent summer, corruption, and latent sins bearing fruit.
I structured the game and story around these ideas. I haven't really had an opportunity to playtest it, so we'll see if it flies.