This work by David Toub explores mathematical and systematic approaches to canonic writing. It is notable for its rigorous adherence to a self-imposed set of generative constraints.
The primary challenge is maintaining clarity and structural integrity within the repetitive, evolving patterns.
Comparable difficulty and character — good candidates for what to learn next.
Canon 11 11 15-11 19 15 is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 11 11 15-11 19 15 lasts about 4 minutes.
Canon 11 11 15-11 19 15 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 11 11 15-11 19 15 (from focused music for piano) by David Toub, 12 by David Toub, 13 Variations on 'Es war einmal ein alter Mann' by Ludwig van Beethoven — see the full similar-pieces list on this page.