Great job! I think you did really well overall. I think the one thing I noticed is that it feels a bit cluttered at moments, I'm not very familiar with creating 8 bit music but I feel like it would work well to either simplify the number of layers at certain points, or maybe it's just how the mix is balanced. Regardless, I listened to the original because I'd never heard it and you did a really great job keeping the feel of the original in yours.