One Pixel Left

Move one stone or copper tile to guide a tiny robot home. Cut power to lasers, open gates, or bridge a gap. Sometimes one move has to do all three.

Solve a board to generate the next one. Each 18 × 9 puzzle has one winning move.

Click or tap a movable tile, choose an empty square, then press Run. Keyboard players can Tab to the board and use the arrow keys and Enter. Two hints are available on each puzzle, and progress saves in your browser.