Cubical is a three dimensional stacking game. The object of the game is to obtain the highest score by filling layers with falling polycubes.

Instructions:

* Use the arrow keys to move the falling polycube around in space.
* Hold the Ctrl key and press the arrow keys to flip the polycube forwards, backwards and sideways.
* Hold the Shift key and press the left or right arrow keys to spin the falling polycube.
* Press the Space bar to drop the falling polycube into place for the highest bonus.
* After filling a layer, each remaining polycube will be shown individually to reveal any empty spaces. Press any key to cancel and resume play.
* Use the < and> keys to spin the stack for a better angle.
* Use the + and - keys to adjust the transparency of the stack.