O・S・A・K・A・N・A

"By tapping the fish, you can make the fish sortie and attack the enemy.
The timing of the fish sortie is important because there is a necessary cost for the fish sortie and the maximum cost is set. When the fish touches the enemy or white, it will start attacking the opponent. The attack will damage the enemy's castle or enemy. The game is cleared by inflicting damage and reducing the health of the enemy's castle to 0. On the other hand, if your castle's health becomes 0, you can start over as many times as you like. There is no health indicator other than the castle, so you need to be careful when the fish will fall. "