If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Play as Ben10 and grab your gun, fight back waves of aliens and push your way to the exits, pick up food to heal yourself and pick up power ups to transform and use more powerful weapons! Upgrade your gun at the end of each level to help you on the next.
WASD to move.
Mouse to aim and shoot.
1-4 to change guns.