Create a single network that links all of the squares to each other. Click on squares with your mouse to enlarge them. Each square can be enlarged a maximum of three times. Also, you can't click the same square twice in a row. That means to click a square more than once you'll have to click it, then click another square, then come back to the original one and click again. When you've connected all squares into a single network, you will continue to the next level.