If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Your goal is to help Ben 10 to kill the krakens. Fire at the kraken to wear down its energy, sending it back into the depths of the lake,before time runs out. Aim for the Kraken's chest for maximum damage. Watch out for it's fire-especially the deadly blue plasma bursts! Shoot them before they land in your path.