kaamos

Somewhere out past the edge of the solar system, you took a wrong turn. Now you're a stray photon on a one-way trip into eternal polar night, and apparently the entire population is waiting for you specifically to fix their lighting situation. No pressure. You had ONE job: keep drifting. Instead, you're saving the world.

Small problem: every move costs you light, and you don't have much to spare. Drift carefully.