Ooh, this is one of my favorite puzzle games from the jam. Moving blocks by swapping them along was tricky at first, but quickly became cerebral and intuitive. The inverse-tetris gameplay is very reminiscent of disk defragmentation and file decompression; it fits extremely well with the story and theme. Also, that is a good choice of stock music.
It took me a minute to realize that I was only able to "select and move" one block at a time (a very cool decision that makes puzzles very bounded and engaging!). It took me another minute to realize that I didn't need the blocks to be in a straight line (a la Bejweled).
I'm honestly not really sure how to improve the text instructions, considering most of my problems were baggage from other superficially similar games (Although "Avoid building narrow pathways" and "Try starting left" were great tips.)
Very good work!