Awesome game, well made sprites, that go well with the art and sound. Having the swinging and the different power ups certainly served to make this a unique game. I like that he expresses anger whenever you destroy an enemy. I had no real issues.
However there were two non-game breaking issues, one was that when you go through certain pipes you can see the player before he can teleport. Another would be that after the second? level upon the completion screen it seems to cut off the text. I suppose I also didn't really know what level I was on after so many attempts, which might also be a good addition.
Really good game though, well done.