If you want to make true 8 bit, try music software like FamiTracker. You can make music that you could hear on real NES/Famicom hardware with it.
Of course, what you have here isn't half bad. I think the high-pitched notes you have in the second half are a bit harsh to my ears, but overall this is pretty cool.
Thanks for the review and well-thought advice. I have not done anything serious with FamiTracker yet, because I'm off-put and intimidated by its unfamiliar interface and control scheme, haha. That's how I feel about it as of now, but I'll definitely grow a pair.
Once again, thank you.