This is a popular Brazilian salon piano piece by Marcelo Tupinambá, a pioneer of the early choro style. It is characterized by its light, syncopated rhythm typical of the Maxixe dance genre.
At Henle 4 this is an intermediate piece that expects secure technique and real attention to phrasing. The main demands: a waltz lilt that needs charm and a flexible left hand; precise articulation — the difference between crisp and blurred is the piece; and fine finger independence within the hand.
Students must focus on maintaining a consistent, bouncy syncopated rhythm without rushing.
Comparable difficulty and character — good candidates for what to learn next.
A level or two down with the same spirit — ideal if this piece is still out of reach.
Where this piece's skills lead: slightly harder works making similar technical demands.
Lesser-known works by the same hand, at a comparable level.
Coisa-ruim is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 3.
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.
A typical performance of Coisa-ruim lasts about 2.5 minutes.
Coisa-ruim 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 Cabeça virada by Marcelo Tupinambá, Arrastando a aza by Marcelo Tupinambá, Colombina by Marcelo Tupinambá — see the full similar-pieces list on this page.