Rule 1: The objective is to connect all identical shapes on the board with continuous lines.
Rule 2: Lines cannot intersect or cross over each other.
Rule 3: You must completely fill the puzzle grid with lines. Leaving any empty spaces will result in a failed level.
Rule 4: Pay attention to the order in which you connect shapes. Connecting them in the wrong sequence may lead to a dead end and a failed level.
Rule 5: Plan your moves carefully before drawing a line, as you cannot undo a move once a line is drawn.

Action: Click or tap on a starting shape to begin drawing a line.
Action: While holding the click or tap, drag to draw the line to the corresponding identical shape.
Action: Release the click or tap to complete the line connection.

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There is no undo button in Filling Lines. If you make a mistake, you'll need to restart the level.

No, lines can only be drawn horizontally and vertically.

No, there is no time limit. You can take your time to plan your moves.