Wow. I love pretty much everything about this game. I recently played through the old Duke Nukem 1 episodes and this reminds me of it quite a bit, but with the added feeling of a decent "Metroidvania". I love the graphics and the sounds. The map/status screen is good. The controls are good.
I only really have three minor "issues". One is that there's no music during gameplay, which is kinda disappointing. The other is that health packs seem to be limited in number, so if I mess up one section I may mess up my endgame by not having any health later on. That said, I didn't really play long enough yet to test that theory. The last issue is just that enemies didn't seem to be any threat at all, but I tend to play a game like this primarily for the feeling of discovery from gaining access to new areas.
Anyway, great game. I love it. Oh and the title is amazing too.
Edit: Do you have any plans to update the downloadable version? I prefer offline games, but the Flash port is much better, in my opinion. I like the taller enemies and the downloadable one crashed with a buffer overflow exception.