- Each puzzle is double-sided; it's up to you which of the two cards you want to assemble.
- To move pieces, press the mouse-button on the piece and drag it to its correct position.
- To view one of the assembled pictures in the background, press the middle of the 3 buttons at the top left of the puzzle.
- To turn over a piece - or block of pieces - key "T" and click the mouse-button over the piece.
- (Using function key F11 for full-screen mode gives you more space)