To be able to reach your objective in each puzzle you've got to match three or more items in the same color and get the set amount of points or objectives. Solve it and you win a prize solve it in very few moves and you'll get some extra money that should help a lot when you go to invest in your aquarium. To add any fish or decorative element you've got to buy things with coins you earn from beating the puzzles you see at the bottom right of the screen. Fishdom is an addictive logic game in which you have to solve brightly colored puzzles to decorate your aquarium, where you can insert all sorts of fish and decorations to enjoy a pretty and alluring aquarium.