This is a really good submission! Although they don't strictly follow the NES sound chip's capabilities, the songs definitely sound authentic - I can tell you have a good understanding of NES style. Your composition is impressive too, File Select and Credits are highlights of this for me.
My favourite track is probably Oppression, I saw in the comments of the YouTube video you didn't like the intro but I actually think it works quite well! It reminds me of Death by Glamour from the Undertale soundtrack. The rest of the song is great too, especially the lead in the main section.
Great job with this one!