Find the exit in the dark. A pulse lights your row and column as far as the walls. Pulses are few; walking and bumping are free.
Tap your light, or press Space — pulse.
Tap an adjacent cell, swipe, or use the arrows — move one cell. A wall stops you and shows its face.
Each step leaves a dot; each bumped wall leaves a tick. Pulse light fades. Reach the ring to reveal the whole maze.
More controls
Hint lights the next cell of a shortest way. Press it again to step there.
Z undoes a step; pulses are not undone. Restart puts you back at the start with a full budget. Escape closes this sheet.
Each cell reads as unknown, open, wall, exit or you, and the status line says what every pulse showed.