Nailed the 8 bit vibe, composition is nice, everything fit as a whole.
Main Menu : Really set the tone but at exactly 1:21 the melody is doing F# while you are playing C major chord with A min on the pad, I was expecting a switch to a dominant chord but you did not and I think it doesn't quite fit here.
Castle : Great track, composition is pretty cool, bass is way too much present, tone it down a notch and it will amazing.
Rest of the tracks feels nice adn easy to listen to, good job !