Fight off the enemy naval force attacking friendly troops on the beach.
Aircraft carriers send planes that launch air strikes on your home base, decreasing your base's "health".
Shoot and Deflect cannonballs at your enemies to protect your base.
Buy extra cannonballs to have in play using either 'f' or the side menu button.
In order to buy cannonballs, you must destroy enemy forces to generate funding.
Once all enemy ships are sunk, you Win! However, if there are no cannonballs in play, or your base runs out of health you Lose.
Good Luck!