First select just one Calamus frame of your document. It does not matter here what type of frame you select, though the contents of a line frame will certainly be less fun ...
The game is controlled exclusively with the left mouse button. You always click on the tile of the image that is to be moved to the adjacent black area. All image tiles can be moved either horizontally or vertically in single steps.
When all image portions are restored to the correct sequence and the black field is visible in the lower right corner, the game is complete.
Have fun playing during pauses of your creative process!