How do I use starting boosters?

Starting boosters unlock at level 6. They place power-ups on the board after the level goals appear and before you make your first move.

Booster	What it does
Bomb and Rocket	Places a Bomb and a Rocket on the board.
Double Fish	Places a Fish on the board. Activating a single Fish during the level sends out two Fish instead of one.
Plasma Ball	Places a Plasma Ball on the board.

Select boosters before playing

Open the level screen.
Under Select Boosters, choose the boosters you want to use.
Select Play to start the level.

A selected booster is used up when its power-ups appear on the board. If a booster is temporarily unlimited, using it doesn’t reduce your inventory.

Consider starting boosters for levels marked one try!, where you only have one chance to win. They can also help on your first attempt at a difficult level, when an extra reward is available.