That is some fantastic playing, Tim!
This piece is free from forms and improvisatory in nature.
After listening to it three times, I did hear a few similar returns but not enough to assign forms. Melody seemed to shift from treble to bass in a few areas. Coda was clearly stated.
I succeeded! I intended for it to have a free dramatic form, hence the term Rhapsody as opposed to Rondo or Sonata. In actuality, this piece is interesting because it's based on a very small number of ideas that are varied significantly, sort of a combination of variations and sonata form. If you listen carefully you should notice that the melody in the detached bass section is the same as the melody that the left hand plays against the chords in the right, both are based on the melodic outline of the opening section. I believe this hidden structure helps the piece sound well integrated and yet the variation gives it an improvisatory feel.
Thanks for noticing.