An atmospheric solo piano work that employs canonic devices to create a shifting soundscape. It is musically notable for its unconventional use of dissonance within a rigid imitation structure.
Focus on layering the dynamic levels to prevent the dense textures from sounding muddy.
Comparable difficulty and character — good candidates for what to learn next.
Canon 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 Canon lasts about 3 minutes.
Canon 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 Canon 'Adagio senza tempo' by Jashiin, Boltzmann Brain by Jashiin, At Twilight by Percy Grainger — see the full similar-pieces list on this page.