I love this! It really reminds me of the really good chiptune music that came out near the end of the NES’s life, very nice complex structures and use of the different layers available.
The vibe is great too, it feels like a more sinister and action-filled version of the original, maybe it could fit an underground level with a boss fight in the end. I feel like adding some extra percussion would help a lot with creating the feel of forward movement, but the rhythmic bass line does a lot to help too.
Well done!