This is another early sonata movement by Mozart, demonstrating his youthful energy and compositional skill. It features a bright, optimistic mood and a clear, symmetrical structure.
Practice maintaining a consistent tempo and ensuring clean articulation of each note.
Allegro (K.72a) is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 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 Allegro (K.72a) lasts about 2 minutes.
Allegro (K.72a) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.