Isn't this a Stencyl template?
First, please don't submit things that come from templates or tutorials. They count as public files, since they're available to everyone. And when you do tutorials, you're not actually creating your own game. You're following steps to re-create someone else's game, and so, that's why they're actually against the rules. A lot of the characters in this came straight from the Stencyl files. Submissions must be your own creation.
http://www.newgrounds.com/wiki/help-information/terms-of-use/game-and-movie-guidelines
This wasn't bad, as far as it looks good and the controls work. The music was good. It was actually pretty cool, but short. The jumping mechanic seemed a bit less controlled than I like.
Also, unfortunately, you can't use Nintendo characters in games. Their lawyers contacted us a while back and we had to remove a lot of content that used their characters.
Since it has copyrighted Mario characters and Stencyl content, and since it's so close to a public file template or tutorial, it will be removed.
Keep working at creating things. Just make it all your own.
You're on the right track, tho.
Good luck. :)