A reflective work by Salvador Torre that explores nuanced harmonic color. It is distinctive for its use of lingering, unresolved dissonances within a lyrical framework.
Effective use of the damper pedal is essential to blend the harmonies without muddying the delicate melodic lines.
Comparable difficulty and character — good candidates for what to learn next.
... de pronto 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.
A typical performance of ... de pronto lasts about 4 minutes.
... de pronto 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 ...sobre el mar nocturno se levanta la luna... by Salvador Torre, Body and Soul by Johnny Green, Fantasy in D minor by Wolfgang Amadeus Mozart — see the full similar-pieces list on this page.