The objective is simple. The computer splits the image in random slices. Slicing leaves each piece with different dimensions and the pieces are scambled and stretched to fit their new 'hosting spaces'. You have to understand the scrambled image and put the pieces back to their place by swapping pairs of pieces. Use the mouse to select a pair of pieces (left click twice).
If a piece gets to its correct place it will temporarily glow green. If you inadvertly choose a piece unselect it by clicking the right mouse button. Everytime you swap two pieces, if any of those gets to its right place, it glows green and the sound is different so you acknowledge that. If the pieces limits are hard to spot you can use the G key to call a grid above them. Pressing space pauses the game with the bonus that this state allows you to see which pieces are well placed since the remaining ones appear grayed out. Version 0.91 includes unspecified updates.