Pixel Erase Maze

There is a maze under all that dust. You just cannot see it yet. Run a finger across the glass and the grime peels away in slow grey curls. Walls appear. Corners appear. Somewhere in the mess is a small spark of light, and somewhere else is the way out. You have to find the path by feel — a little sweep here, a wider wipe there — then drag the spark along it without scraping the walls. The dust never comes back, but the maze changes shape every time you clear it. A quiet, grubby little puzzle for people who like uncovering things.