Satisfying to have figured it out after about 3 tries. Nice idea and a good puzzle type play.
Here's my submission: http://www.lostwords.org/falling-block-jam-start/index.html
And below is a very solvable boggle meets Tetris alternative that is part of the full suite of Simultaneous games.
http://www.lostwords.org/falling-block-jam-start/1.html?letterslist=%20%20R%20%2...