Every piece. Every square.
Tap or drag. No timer. Room to rethink.
New arrangements are generated and checked each time. Complex uses six different five-square pieces, with bends, branches and asymmetric shapes.
Fill the board using every piece, without gaps or overlaps.
Tap a piece below, then tap the board square where its white dot should land. The dot is your placement anchor. The selected preview shows its current orientation.
Use Rotate to turn the selected piece clockwise. On the board, press the ↻ button inside a piece to preview a turn, then release. If the turn hits another piece or the edge, the preview is marked red and the piece snaps back. You can also drag a piece from the tray onto the board: the tile you grab stays under your finger, even after rotation. A full-size preview shows where it will land. Green means it fits; red means it won’t.
Tap or drag a fitted piece to move it again. Its old position is kept until your new placement succeeds. Use Return piece to tray to remove it. Undo reverses a move or removal. Retry clears the same board. New fit creates a different puzzle.
Nudge fits one piece while preserving a possible solution. If your current placements block a full solution, it asks you to undo or lift a piece.
Pieces have letters as well as colours. With a keyboard, Tab to a piece or square and press Enter or Space.