Push the red block into the blocked off opening in the top center of the stage. To do this you will need to click and hold and then move your mouse from side to side or up and down to slide the green rectangles. To receive the best score possible you need to perform all these actions in the least moves possible. Sometimes you will need to push the red block off the green rectangle that it originally started on to get it to the goal. To do that you will have to use another block to slide it up against to push it off and make the red block fall onto another green rectangle.