Subtitled 'The Rage over a Lost Penny', this work is a lighthearted and virtuosic rondo defined by its recurring, obsessive main theme. It stands out in Beethoven's output for its humor and rapid-fire pianistic demands.
Maintaining clarity and controlled speed in the right-hand passagework while keeping the left hand steady is essential.
Comparable difficulty and character — good candidates for what to learn next.
Rondo a capriccio in G major (Op. 129) is rated Henle level 7 of 9 — late advanced repertoire, roughly ABRSM grade 8 and above. In the RCM system it corresponds to about level 10.
You should be comfortable at Henle level 7 — meaning you can already play level 6–7 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 Rondo a capriccio in G major (Op. 129) lasts about 6 minutes.
Rondo a capriccio in G major (Op. 129) 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 12 Variations on 'Se vuol ballare' by Ludwig van Beethoven, Piano Sonata No. 21 'Waldstein' by Ludwig van Beethoven, 10 Variations on 'La stessa, la stessissima' WoO 73 by Ludwig van Beethoven — see the full similar-pieces list on this page.