Mozart's '9 Contretänze' K.510 are spirited dances, originally conceived for orchestra but also enjoyable on piano. They feature clear, catchy melodies and a lively, often syncopated, rhythmic character.
Maintaining a clear staccato touch and precise rhythmic drive is important for these cheerful dances.
9 Contretänze (K.510) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 6.
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 9 Contretänze (K.510) lasts about 10 minutes.
9 Contretänze (K.510) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.