At first listen i think this is organ that at some point layers several keyboards sounds, one of which being a harpsichord?  A lot going on just with instrumentation alone. It is always a breath of fresh air to hear what sounds like a soloist as in one player. Where most submission would require an orchestra. I can hear the classical but im well acquainted enough to have a taste for it, but it sounds like something from the baroque period structurally. (I could be wrong tho, its been years since my theory & composition class). Also understanding this piece as a call and response between classical and jazz, with jazz being noticed by the chord structures and classical distinguished by one note at a time. Also the jazz section seems lack a the tonal center, or maybe a shifting tonal center.
Man my head is exploding, this is the most academic piece in this submission to me. i almost get an adams family impression but that maybe the selection of instruments. Particularly super nintendo adams family, but not 8 bit.  Generically this would fit a dark game that seeks to defy expectations, and is just as challenging to play. Music for academics fit only for games that embrace hard core gamers. Nice job!