This is a salon-style character piece by the French composer Félix Fourdrain. It evokes the exotic, twilight atmosphere of Algeria through flowing, sentimental melodic lines.
The primary challenge is maintaining a sustained singing tone in the melody while balancing the delicate accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
Alger le soir is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 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.
A typical performance of Alger le soir lasts about 3 minutes.
Alger le soir 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 Au printemps by Félix Fourdrain, Ballade by Félix Fourdrain, Ballade by Ricardo Castro — see the full similar-pieces list on this page.