Charles Neustedt provided many such transcriptions for the amateur market during the late Romantic period. The work relies on florid passage work to decorate the well-known themes from the opera 'Vert-vert'.
At Henle 4 this is an intermediate piece that expects secure technique and real attention to phrasing. The main demands: a true singing tone, with the melody floating above the accompaniment; ornaments that need to sound effortless, not squeezed in; and continuous sixteenth-note figuration that must ripple, not chatter.
The main difficulty lies in balancing the singing melody against the constant motion of the decorative sixteenth notes.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Lesser-known works by the same hand, at a comparable level.
Fantaisie-transcription sur 'Vert-vert' (Op.93) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Fantaisie-transcription sur 'Vert-vert' (Op.93) lasts about 6 minutes.
Fantaisie-transcription sur 'Vert-vert' (Op.93) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Fantaisie-transcription sur 'Mignon' by Charles Neustedt, Fantaisie brillante sur 'Don César de Bazan' by Charles Neustedt, Fantaisie-transcription sur 'L'oca del Cairo' by Charles Neustedt — see the full similar-pieces list on this page.