Controls: ×: Desktop: Left-click an empty square to reveal it.; Right-click (or Ctrl+click) an empty square to flag it.; Midde-click (or left+right click) a number to reveal its adjacent squares. Press space bar while hovering over a square to flag it or reveal its adjacent squares. Press F2 or click the smiley face to start a new game.; Mobile: Tap an empty square to reveal it.