Menu Song: This is catchy. I like your expression of a small idea and expanding on it. I also like the alternating pan of the clavichord.
A Beginning: I like the bass pedal tone under the chord changes. The slow steady bass drum and the building of layers gives this track nice forward motion.
An Ending: I like the chord voicings you use. The third chord in the A section using the inversion gives it the added tension that makes the fourth chord that much sweeter.
A Longing: I could listen to this track loop over and over. The high register arpeggios and the smooth drum beat are a great backdrop for this melody.
Overall: I think you have great musical intuition. The theme and variation is evident in each of the tracks and is a strength of your work. I only wish the tracks were longer!