This is a variant spelling of the famous Neapolitan comedic performance piece. Its unique appeal comes from the mimicry of human laughter through the piano's articulation.
The technical challenge lies in the rapid repetition of notes without sacrificing clarity.
Comparable difficulty and character — good candidates for what to learn next.
'A risa is rated Henle level 2 of 9 — beginner repertoire, roughly ABRSM grades 2–3. In the RCM system it corresponds to about level 2.
You should be comfortable at Henle level 2 — meaning you can already play level 1–2 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 'A risa lasts about 2 minutes.
'A risa 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 Blumenwalzer by Léon Jessel, Bluin' the Blues by Henry Ragas, Bohemia by Joseph Francis Lamb — see the full similar-pieces list on this page.