about your last response...
As for your instruments... that's not really all that important. Something that I learned fairly recently is that you want all your instruments to be fairly evenly spaced out on the frequency spectrum. For example, in this song you have a lot of high-pitched stuff happening. Just by making one of them an octave or two lower would make this song a lot better. Also, make an actual bass part. Just having an 808 as the bass will work for a short time, but for the girth of your song you need a punchy, low bassline.
I disagree with the previous reviewer... I do not believe that the arp thingy makes anything clash. It fits perfectly, but is completely unexpected. After all that time, the listener is expecting something happy. If you don't want this song to be happy, add a simple something to the beginning that gives the feel you want.
I hope this helps a little. Just listen to a lot of music here on newgrounds that you want to sound like and just sit and analyze it... and see if you can figure out how to sound more like it.