Work on getting your Pets down in the columns to the right of the game.
You can slide columns to the left and use the advantage of the walls in the center of the game to help get them down more quickly.
Springs drop on the left side of the game and bombs in the middle, these can also be used to help clear mesh off blocks, or to simply remove blocks from the board.
Moves are limited in this Level, so you need to judge each move carefully to get all the Pets rescued.