I loved the walking puzzle pieces!! They were too funny, haha. I also liked the death effects for the enemies, the way they sort of faded out. It made the game feel really unique and easy to understand the enemies' HP without cluttering up the map with lots of HP bars and the like. I thought the controls were good, though I would have preferred LMB instead of RMB (but this is just my personal preference) and the idea of picking up extra puzzle pieces to get a faster/stronger attack was really fun. I had a great time with this one!
By the way, we played your game on our stream tonight!