vocal is clear, open and airy. occasionally there's a little brittleness that pops in that i'm assuming is the upper mid freq boost inherent to your large diaphragm condenser (most LDCs are doing this these days, including mine). it could use some warming up, but the vocal sounds basically good.
the
acoustic guitar seems to fade in and out--at times it vanishes entirely. at first i wanted to say, "the guitar needs more shimmer," but when the guitar is audible, the tone seems fine. perhaps just boost the level a bit during the vocal parts, and add a touch of reverb on the guitar track?
and the piano notes that are following the vocal melody are too close in level to the vocal itself. i think it would work better blended lower to complement rather than drive the melody. if you pull back a bit on the piano, the guitar may even rise to the surface without having to boost it.
as a whole, every track sounds clear and clean but lacking depth. believe me, i'm not trying to assault you as if i'm some master recordist, because i'm definitely not. just trying to offer you a dispassionate, non-partisan set of ears. hope this helps...