Nice little waltz. Some pointers: this is actually simply in F minor, which has 4 flats in the key signature. The raised 7th is very standard in minor key music and part of the harmonic minor scale, nothing modal about it, especially not phrygian. All those G sharps and C sharps would be spelled as A flats and D flats as well, and those pedal markings would not work on a real piano because it would just muddy up the sound. Repedalling every measure is pretty safe here. You don't need rehearsal markings; those are for rehearsals with multiple performers, but this is for solo piano. "legato" being on both staves is unnecessary. "Normal" is not a marking that appears in piano literature anywhere; if you want the legato to stop, either remove the legato and slur the passage, or where you have "normal", put "non-legato". I also feel that since the chord progression and motivic content repeats ad nauseam throughout the piece, it doesn't really merit being over 5 minutes long, but that is my opinion. Since it seems you also feel it's too long, here's what I would suggest. Remove a section, or more. I think this could work as a simple Ternary form or Rondo for example. And make the different sections contrast with eachother Listen to this beautiful waltz for solo guitar by Barrios and pay close attention Agustin Barrios Mangore's "Vals Op. 8, No. 3" played by Raphaël Feuillâtre on a 2020 Julia Wenzel it has a very clear structure: an introduction followed by the A section in D minor, which goes twice. Then onto the B section, also in D minor, but notice how he switches the new section up, even when in the same key: completely different rhythms and motifs, different register, different chord progression, etc. This section also goes twice. Then a brief return to the A section, going only once. After that, he switches to D major for a huge contrast in the C section, basing itself on one of the motifs from the B section, and this section is itself in a mini ternary form, before it transitions back to the A section and closes. For your piece, I wouldn't attempt to modulate like this piece does, since you don't quite yet have the skill to do so successfully, so keep it simple in scope. I hope this helps.