Thanks very much for your comment!
A menu option to reverse the d-pad is coming up in the next version.
I hadn't noticed that there was another game called blocks! I've updated the title of this page. It will take a bit longer to change the title screen in the game (I may try and come up with a different name altogether).
Regarding clearing 4 edges without an empty box: very good point :D I've updated the page. Thanks again for trying the game and for your feedback!