Swipe the rocket with a piece to send it off. It will target a piece related to the level goals as default. After the goal has been met it will clear off a random piece.
You can select to start a level with toy rockets by selecting it from the menu before the level starts. This will place three rockets on the board.
If you match four pieces together you'll unlock a toy rocket on the board.
Swipe with another boost to increase the power!