warning 4 ur work
i used to only use midis 4 making orchestraded mixes of songs. Now I cant tell 4 sure but did u add anything 2 the song cuz newgrounds wont tolerate just changing instuments, if they find u theyre pretty serious when they say 'take down the song or we delete ur account. U hafta make sure ur changes stand out or explain them in ur description of the song. But i will give u big points becuz it does sound cool.
Just thought u should know :)