In this variant of the classic Tetris, the pieces have always the same shape, but the skulls that compose them have their role. You can change the position of these skulls during the fall, and your goal is to put them together when they are equal. When you have at least 3 together, they will disappear.
Arrow keys right/left to move horizontally. Arrow key up to rotate the skulls integrating the falling piece; arrow key down to drop the piece.