This is a contemporary piano character piece that draws inspiration from Bach's harmonic vocabulary. It juxtaposes minimalist textures with subtle thematic nods to the Baroque master.
The primary challenge lies in balancing the voices to achieve an atmospheric, glass-like transparency.
Comparable difficulty and character — good candidates for what to learn next.
Bach's glass is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5.
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 Bach's glass lasts about 3 minutes.
Bach's glass 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 Gymnopédie No. 1 by Erik Satie, Gnossienne No. 1 by Erik Satie, Brises marines by Henri Dallier — see the full similar-pieces list on this page.