These boosters are available in the game right now:

1. Rainbow Ball lets you start levels with a Rainbow Ball placed randomly on the field.

2. Double Planes doubles all the Planes on the field (once you activate one, you see two of them take off).

3. Bomb and Rocket lets you start the level with a Bomb and a Rocket placed randomly on the field.

4. Hammer clears the piece from one tile (if used on obstacles, it weakens them). This booster is only available once you start playing.