No. Your puzzles were great! I didn't have a hard time solving them, besides the last one that I don't think was finished. If it was, I wasn't able to complete it. Sorry I forgot what the puzzle was like, but if know a level that can not be beaten, then it is most likely that puzzle. Keep up the good work!
Edit: I just realized that you commented this on other post that you don't need the box for one of the levels and it is probably the level that I was stuck on. I just didn't figure this out. I'll give it another shot!