Match 3 or more identical halloween avatars to make them explode before time runs out. If you match 4 or more identical halloween avatars you'll get extra time. Match 4 identical avatars in a row / column to get a bomb. Match 5 identical avatars in a row / column to get a changing avatar, that will destroy all identical avatars and will give you extra time for each exploded avatars. If you are lucky, you'll get extra time in the board.