Crystalfish is a matching game for everyone. Swap crystalfish horizontally or vertically and get points for it. Its simplicity and straight forward control is the key for a fun gameplay.
Click any horizontal or vertical adjacent pieces to swap them. If the swap results in lineup of three or more of the same type of fish crystal, the swap is successful and your score will increase.
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.