Mozart's Contretänze, K. 603, are a collection of German dances composed for orchestra, but often transcribed for piano. They are characterized by their light, cheerful melodies and clear, balanced phrasing typical of the Classical era.
Focus on maintaining a steady, graceful tempo and clear articulation of the dance-like rhythms.
2 Contretänze (K.603) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 5.
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.
2 Contretänze (K.603) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.