This piece experiments with complex subdivisions and a high density of information within a short timeframe. It is distinctive for its nervous, shifting energy and unconventional rhythmic layering.
Coordinating conflicting rhythmic groupings between the left and right hands is the most difficult technical hurdle.
Comparable difficulty and character — good candidates for what to learn next.
216.25 is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 7.
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 216.25 lasts about 3 minutes.
216.25 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 Ballata by Ernest Chausson, Berceuse de guerre by John Alden Carpenter, "¿Qué Pasó?" aria from "The Adventures of Don Carlos" by Matthew C. Weiss — see the full similar-pieces list on this page.