Defend your kingdom from your flying castle. You're battling waves of mechanical invaders to get to rescue the princess! Capture coins and other power ups so you can upgrade your firepower and bolster your defense. Use your arrows or W, A, S and D keys to move and our mouse to aim and shoot. Hold down the mouse to fire continuously. Can you win the battles to win the war and rescue the princess? Have a marvelous time playing Fortress Magnus!