Tap the screen to begin your submarine mission. Utilize the directional buttons to navigate your submarine through the underwater terrain. Evade enemy submarines and hazards to survive. Press the attack button to fire torpedoes at enemy targets. Collect power-ups to improve your submarine's firepower, pace, and protection. Defeat all enemy submarines in each level to advance to the next mission. Stay alert to elite enemies that require multiple hits to overcome. Finish all levels to achieve victory.