This is a minor-key blues/boogie hybrid piece intended for amateur enjoyment. It utilizes repetitive rhythmic structures and basic harmonic loops characteristic of the style.
Focus on keeping the left-hand ostinato steady throughout the transition between different tonal areas.
Comparable difficulty and character — good candidates for what to learn next.
Boogy Iz is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 3.
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 Boogy Iz lasts about 2 minutes.
Boogy Iz 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 Camaroon Art by Earl Richard Drehmer, Black and Blue by Earl Richard Drehmer, Alexander's Ragtime Band by Irving Berlin — see the full similar-pieces list on this page.