Combining boosters creates a bigger explosion and helps you clear more tiles.
Rocket + Rocket clears the row and the column of that tile.
Rocket + Bomb clears three rows and three columns of that tile.
Bomb + Bomb clears the items within a four-tile radius.
Butterfly + Butterfly creates three Butterflies that clear three random game elements. When activated, Butterflies also clear neighboring tiles.
Butterfly + Rocket or Bomb makes the Butterfly carry the Bomb or Rocket along with it to a random tile. When activated, the Butterfly combination also clears neighboring tiles.
Cluster Ball + Rocket or Bomb or Butterfly makes the Cluster Ball turn the most common colored items on the board into a Rocket, Bomb, or Butterfly.
Cluster Ball + Cluster Ball clears all the items on the board, and it also clears one layer from any game element.