Boosters help you clear levels faster. You can earn them as rewards for in-game achievements or purchase them.

Rocket Booster gives you one Rocket power-up, which will appear in a random spot on the board when you start the level.

The Dynamite Booster gives you one Dynamite power-up, which will appear in a random spot on the board after the level starts.

Rainbow Ball booster gives you one Rainbow Ball power-up, which will appear in a random spot on the field after you start the level.

If you already have these boosters, you can select them on the screen before starting the level.