Your first fold

Two numbers. One picture.

For each line, plain numbers count filled cells and underlined numbers count overlapping pairs.

Pair cells from the ends inward: for four cells, 1↔4 and 2↔3. A pair counts only when both cells are filled.

• ⚑ marks a fixed cell given at the start.
• Choose Fill or Mark empty, then select a cell. Hold and drag to mark several cells at once.
• Filling a cell that should be empty, or marking a cell × that should be filled, costs one heart. The incorrect mark isn't kept.
• Dragging skips marked cells and stops at the first mistake, so a single drag costs at most one heart.
• Once all filled cells in a line are found, its remaining cells are automatically marked ×.
• Hints and undo cost no hearts. One undo reverses a whole drag, but doesn't restore lost hearts.

You start this demo with 3 hearts. Content and values may change in the full game.