I liked the first half, very nice. Here are some random observations:
In measures 1-2 you have an IV chord in 2nd inversion that doesn't resolve according to 1 of the 3 typical ways. Remember that the guitar sounds an 8ve lower than notated, so that E in the bass is the real bass, not what the piano plays.
Im m.7 you have that E7 chord that doesn't resolve as most dominant 7th chords do.
In the same measure you don't resolve that F#m7 chord either.
In m.15 the piano moves in arpeggiated parallel chords that have parallel 5ths. That isn't consistent with the style of the first part.
In m.19-20 you change the harmonic style a lot. The piece began in a very classical/romantic vein and here it sounds like Shostakovich with that very unconventional, chromatic voice-leading.
Keep composing!