This piece is a delicate, modernist take on the lullaby form by French composer Jehan Alain. It is musically distinctive for its sparse texture and its focus on two recurring, dissonant notes that create a hypnotic, bell-like effect.
The primary challenge is maintaining an even, ethereal touch while balancing the two dissonant notes against the melodic fragments.
Comparable difficulty and character — good candidates for what to learn next.
Berceuse sur deux notes qui cornent, JA 7bis is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 7.
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 Berceuse sur deux notes qui cornent, JA 7bis lasts about 3 minutes.
Berceuse sur deux notes qui cornent, JA 7bis 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 Berceuse sur deux notes qui cornent by Jehan Alain, Au Crépuscule by Mel Bonis, Berceuse by Ilmari Hannikainen — see the full similar-pieces list on this page.