:) -=- Might I respectfully add that a menu item:
/CREATE YOUR OWN LEVEL/
.. that would be so awesome :) and people could share their puzzles somehow? maybe just wishful thinking on my part but would be super! 

This is not a negative comment but I have only one specific example of a control that is NOT intuitive .. er.. to me anyway: the left click to place, then hold-left-mouse-click to rotate? sometimes things get stuck diagonally after this or revert to aligned-to-vert/horiz position and i have no clue why this occurs.
-=-
Love the game, so cool. I mention only in hopes that it might help make a great game even better. 

amazing. such a unique game. i hope you keep making amazing games (this one or whatever). :)