Arno Kleffel's Albumblatt utilizes lush, expressive harmonies typical of the turn-of-the-century piano miniature. Its character relies heavily on the pianist's ability to maintain a continuous, vocal-like melodic line.
Focus on the thumb for melodic voicing within the texture.
Comparable difficulty and character — good candidates for what to learn next.
Albumblatt 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 Albumblatt lasts about 3 minutes.
Albumblatt 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 Allegretto grazioso by Arno Kleffel, Für Elise by Ludwig van Beethoven, Prelude in E minor, No. 4 by Frédéric Chopin — see the full similar-pieces list on this page.