Karel Komzák II was a prolific composer of Viennese light music, and this piece exemplifies his ability to craft tuneful, rhythmic salon works. It is characterized by its infectious melody and charming, dance-oriented structure.
Maintain a balanced relationship between the lively melody and the march-like accompaniment in the left hand.
Comparable difficulty and character — good candidates for what to learn next.
Bruder Martin (Op.221) is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 4.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 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 Bruder Martin (Op.221) lasts about 3 minutes.
Bruder Martin (Op.221) 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 Baratarie-Marsch by Karel Komzák II, The Entertainer by Scott Joplin, Bach-anh-114 by Johann Sebastian Bach — see the full similar-pieces list on this page.