How do Power-ups work?
You earn power-ups at certain levels. Power-ups help you complete the levels successfully. You can buy power-ups by using your Coins or Crystals. 
Color Magnet: Collects all Drops of the same color. 
Magic Hammer: Removes a Drop, bush or sea shell.
Shuffler: Shuffles the Drops on the board.
Double Score: Gives you double score during a single game. 
Double Coins: Gives you double coins during a single game.
+5 Moves:  Gives you 5 extra moves.