Big Smash is all about firing tennis balls at a tower of cubes and watching them tumble off the table. Sounds easy, but hitting the stack doesn't always bring it down. Stone, wood, ice, and jelly react differently to each shot, so you'll need to find the right spot to make the biggest mess.
Pull back the cannon, aim at the cubes, and release to fire. On a computer, click and hold while dragging to adjust your aim. On a phone or tablet, tap and drag, then lift your finger to launch the ball.
Try aiming at different spots. If you only knock off the top cubes, go for the bottom of the tower on your next shot. If the tower shifts to one side, take advantage of that opening instead of repeating the same shot. A little adjustment can make the difference between knocking off two cubes and sending the whole stack flying.