I wasn't able to finish your Hangar 66 level. I'm not masochist enough to endure this.
However, I really enjoyed all levels before that, especially the Punch-Out one, that was brilliant! Even though I died twice at Magikoopa because he attacked faster than me, still very good.
I will try to play the other ones, too. You really went all out with them, didn't you? I can't imagine how much time and effort you've put into them. Great work, man!