Each level has a set amount of time for you to finish within in order to complete the level. You must match three or more jewels of the same shape and color in order to get rid of them and, if they are on the special tiles, it will get rid of the special tiles beneath them as well. You can fill up bonuses but getting rid of more jewels at once. For example you must get rid of four or more jewels at the same time and multiple times in order to fill up the shuffle bonus. Once it is full you can shuffle the jewels on your screen.