This piece is a highly experimental modern work that challenges traditional tonal expectations. It is distinguished by sudden shifts in texture and an aggressive, kinetic rhythmic drive.
Maintain precise rhythmic coordination during the rapid, angular motive shifts.
Comparable difficulty and character — good candidates for what to learn next.
$naFU is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 8.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 $naFU lasts about 3 minutes.
$naFU 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-Impromptu in C-sharp minor by Frédéric Chopin, March of the Trolls, No. 3 by Edvard Grieg, Canto Karabalí by Ernesto Lecuona — see the full similar-pieces list on this page.