By swiping a finger across the screen to move a small fish, the fish will be rewarded with points when they encounter a similar fish.
Then it becomes a different kind of fish and gets bigger.
When a small fish meets a different kind of fish, lose a heart, when all the hearts lost, the game is over.
When a small fish meets a star, it becomes smaller.
When the fish touches a heart, the fish gets a heart.
Come on, score higher.