At any time while playing a game you can press "S" to see the solution. However, only the first five levels have solutions provided. For those you can choose between an animation of the solution or you have the option to step through it. If you choose the animation you will also be asked to specify the speed as a number of moves (between 1 and 9) per second. This speed can be increased or decreased (within these limits) while the animation is playing by use of the up and down arrow keys. You can toggle between the two modes at any time.