This is quite a typical match-three game. You have jewels of different colors and shapes in the playing area. You can switch places of any 2 adjacent jewels to form a line of 3 or more identical ones. If you do it, this line disappears and the free space is occupied by the jewels above. If you eliminate a line over special tiles they either become normal directly or change their color and become normal after several matches. Your goal is to clear all special tiles in each level.