Inspired unquestionably by the Prelude in B-flat Minor from Shostakovich's Op. 87 (in the structure) and the Prelude and Fugue in E Minor from Kabalevski's Op. 61 (in the theme); despite drawing inspiration from two of my favourite works from two of my favourite Russian composers, though, I still feel there's something that's ... not quite done with this one. Perhaps I'll revisit it at a later date (maybe to add a fugue?), but for now I have a deadline to meet!
Alright, so we're pushing the bounds of theoretical good taste here. It's kind of in B-flat major, but mostly because of the last two chords. It's sort of tonal, but only because it remains (mostly) triadic. Bach would likely have rejected it; cadencing in E minor from B-flat major is really not appropriate, nor is a B-natural against a B-flat no matter what the voice-leading is doing.