Tetromino Stack

Made in 24 hours for Ludum Dare 49.  Move the blocks from the right to the left. Don't let any fall. How high can you stack them? Update: I've posted a Post-Jam version that includes Chill Mode, where the next block only shows up when you've picked up the previous block. In Chill Mode there is also an option for manual rotation of blocks with Q + E or A + D.