This is a contemporary work by Brazilian composer Luiz Henrique Yudo. The previous attribution to Sergei Zagny was factually incorrect.
Attention to precise articulation and the handling of layered textures will be key to realizing the composer's intent.
"On Words: J" by Luiz Henrique Yudo is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
"On Words: J" by Luiz Henrique Yudo is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.