Use your light saber to slice the shapes as they fall down. They fall fairly slowly, which gives you enough time to slice them up. Don't just stop after one slice. After the shape splits the first time, it will change colors. If one or more parts of the shape are not yellow, you need to keep slicing them until they are all yellow. If non-yellow shapes reach the bottom of the screen, they will turn gray and freeze. As they pile up, they will get closer and closer to the top. You need to use a red block to blow up the gray blocks. Click and drag your mouse through a shape to slice it.