In 2018 I participated in the Global Game Jam in Richmond Virginia. I worked on pixel art assets, many of which were not used in the final game. The premise was that you are a pigeon raised by a scientist. You carry a glass beaker with a special compound to a neighboring scientist - unfortunately, you're one clumsy bird and keep dropping liquid. With each drip, the world becomes increasingly sick with an unknown disease.
But what do you know, you're just a delivery pigeon.