This contemporary set of excursions explores various keyboard textures and patterns. It is characterized by its accessible, idiomatic writing style for the piano.
The player must manage wide-spanning arpeggios while keeping a consistent pulse.
Comparable difficulty and character — good candidates for what to learn next.
1155 Piano Excursions (Op.1155) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6.
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.
1155 Piano Excursions (Op.1155) 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 220 Nocturne for Piano No.10 by Stephen W. Beatty, Canto Karabalí by Ernesto Lecuona, Black Bossa by Ulrich Nehls — see the full similar-pieces list on this page.