Use your LEFT MOUSE BUTTON to pick up and place the blocks. Press the LEFT MOUSE BUTTON (when off the grid) or the SPACEBAR to rotate the pieces. Match two or more blocks of the same color to win bonus "color match" points. Try not leave any single holes. If you get stuck, use the limited 'Sledge Hammer' or 'Cement' power up's! Get rid of a block you've picked up by dropping it in the green bin.