At the beginning of the game you will be able to see the finished puzzle, so that you have an ideea of how it has to look and where to put the pieces. You will have to press on the Mezclar in order to shuffle the pieces arround. The, you wll pick them up using your mouse, and will put them togheter to form the image. If you are getting bored or just can't solve the puzzle, you can press Resolver in order for the game to solve it for you.