Fun puzzles. The last two puzzles seemed a little odd to me. They weren't bad really, they just had a lot going on but the solutions seemed to ignore most of the puzzle and in the case of level 9 I finished with a ton of extra moves.
I was also a little unsure about how it chose which block to connect when there were multiple available blocks. But it seems that there were very few opportunities for this to happen, which was probably a clever choice on your part. If you are going to make more levels, particularly with this mechanic involved in the solution I think it would be nice if this were explained or made clear from the interface.