Glitch City!
Would be nice if you could make it a little more like minecraft where you desroy blocks and build instead of just moving them around. And what's with the parakoopa that keeps coming up all the time?That thing is super easy.
Now about the music this is TOTALLY wrong. You are not supposed to use the famous Geno's Maze song in a game like this just because it's one of the most popular songs in Mario history. Use a different song! Since it's a Super Mario World sprite make it a Super Mario World song. You can't go wrong with compatibility. :)