Glissandos on a piano, now that's interesting! The variety of this piece is at times great, and others, confusing me, as I would like some sections to go on longer than others. I do like your ideas, but think transitions could use work. Or perhaps what I mean is song structure, as I am not always immediately able to understand where we are going with the song.
That synth at 1:48 reminds me of James Bond on the N64 in a very pleasant way.
Overall, with some reworking of structure, I think you have a good composition. I think a shorter piece, so that fretless bass sound does not become stale after the 4 min mark or so, some louder drums (except the hi-hat, that is probably fine volume wise), and keeping up where you are already going with feeling your panning, and this would be such an atmospheric piece.
I would probably put this in videogame music. Drum and Bass is more of an aggressive electronic genre, not literally drum and bass, aha. Don't worry I've done that too and I usually have no idea where to put my stuff.
Keep doing what you're doing, and thanks for coming out to NGUAC!