Defend your sand castle from incoming invaders. If they land near the shores, they will take you out before you have chance to respond! Arc your shots with just the right power and make sure you sink every enemy vessel, tipping them over will not finish it! Upgrade your weapons before the next group arrive and own your sand!
Select items to buy - Use the mouse. Fire weapon - Use the mouse to aim the angle, and press the mouse when the strength bar is at the appropriate length to fire.