Man, what a fun and creative game! I finished all the levels and spent a good amount of retries on the last one. Sadly it just froze after I beat it, I would've loved a little satisfying victory screen, but hey it's a game jam game so I can hardly fault you for that.
One thing I would've *really* liked to see is some sort of free form camera though, or a top-down view that I could toggle. Anything really that would allow me to get a nice overview of the entire playing field. As it stands I had to memorize the locations of some of the enemy pieces when the field was big enough that I couldn't see them.
Still though, I had a tremendous amount of fun. Really one of the standout games of the jam for me. Excellent presentation, engaging gameplay and a good challenge. Excellent job!!