A standard Allegro movement by Mozart in G major, this piece showcases his characteristic melodic grace and harmonic ingenuity within the Classical sonata framework. It requires both virtuosity and refined phrasing.
Concentrate on developing evenness and control in the rapid scalar and arpeggiated passages.
Allegro in G major is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 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 in G major lasts about 5 minutes.
Allegro in G major is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.