If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
This time there is a Super Villian that has made clones from the avengers and it is growing them in bubbles. Use the space cannon to eliminate all the bubbles clones and free the world.Clear all the Bubbles by matching up 3 or more avengers alike. If you shoot and do not clear any bubble you will lose one heart. After losing all hearts a new line of bubbles will appear.