Everyone loves presents. While these blocks look like presents, they are not quite presents. They have various lines that criss-cross through them, and you must line them up as you would in a game of Tetris - by using the arrow keys to rotate, move, and speed their descent. After three blocks are lined up with actual straight lines all the way through, they will burst and the gifts inside will be yours. So, if you want those presents open, then keep your eye out for multiple combinations that will bring in the big points.