Form matches of 3 or more identical pieces horizontally or vertically, by swapping 2 adjacent pieces. Break all the golden tiles by making combinations above them.The level is done when all the golden tiles have been cleared. Make sure to finish every level before the meter on the right is empty.

Left click on pieces to swap them. Pieces can only be swapped if it results in a match of 3 or more in a row.

Break all the golden tiles by making combinations above them. The level is done when all the golden tiles have been cleared. To collect a silver tile, you need to make a match over it two times.

Click on the eye on top, to the left, to pause the game. Click the screen to continue the game.

Break locked pieces by bringing the other matching pieces to the locked one. If a piece is double-locked, you need to break it twice.

Use the money you've earned to buy fish, ornaments and upgrades for your tank. Click on 'shop' and choose a category. Left click an item to buy it. If you buy an ornament, use the mouse to place it in the tank.

• firecracker: destroys all within a radius of 1 tile. This explosive appears only as a result of a cascade match of 6 or more falling pieces and cannot be earned by a player's match
• depth bomb: destroys all within a radius of 2 tiles and can be earned by a match of 5 pieces
• dynamite charge: has a radius of 3 tiles and can be earned by a match of 6 pieces
• warhead: this powerful explosive destroys everything within a radius of 4 tiles and can be earned by a match of 7 or more pieces
• lightning: can be earned by the use of 7 explosives on a level. The lightning can destroy all the pieces of the same type present on the game-field. Swap it with a piece of the type you want to get rid of