Definitely an interesting variety of levels that had me pretty confused, especially on the final set. Though not too challenging it definitely made me think, I'd say it's definitely a pretty good balance compared to most jam games. I feel like most people either ignore the "Jam games are hard" thing or they make incredibly easy games and I feel like this hits a nice in between.
One really nice thing is the clear distinction between what every block does, it was quick clear which block did what. Immovable vs goal etc., though if you add more levels I definitely think more types could be cool?