There is very little that sets this apart from any other Madness tribute flash here on Newgrounds. It looks like you drew some of your own sprites, which is a step in the right direction, but overall it is very by-the-numbers.
My first bit of advice would be to stop making tributes to someone else's work and make something of your own. Original characters in original situations will take you much further than "Madness guy kills stuff."
As for the actual flash, there is nothing to set it apart from the hundreds (if not thousands) of Madness flashes here on Newgrounds. The animation is fairly competent, and most of it looks pretty good. However, I hate to say this is nothing special. If you want to see a Madness flash done well with some originality, check out the Redness or Xionic Madness flashes.
Best of luck in the future.