Sequoia

How could the world's most popular puzzle game be made even simpler? By removing the walls and the floor! In Sequoia pieces fall from all directions. Instead of filling four lines, your objective is to create coherent squares of four by four blocks.

Controls:

Move and rotate your shape: Arrow keys (The arrow key pointing in the direction opposite to your shape's falling direction is the rotation key.)

Toggle full screen mode: Escape or Command-f
Quit: Command-q