Awesome
That's one kick ass remix. Not only Am I probably the biggest Super Mario World fan in the world, and if not I'll swear my life I'm tied, but this is my favorite song from the game.
As for your remix, I like how it's very energetic feeling, very upbeat. Melody still stays true to the original. I'm personally not a fan of the Jamster frog noise or whatever it is you got going on in there, hope you know what sound im talking about, but it doesn't hurt the song at all, i would just prefer it not in there. Also It is a dance remix so I guess it fits well. I love the arpeggio (I think thats what it is) of the rise and decline of the fast notes, sounds amazing. Great job overall, needs a better ending but amazing for your first piece.
-Porter