No information given.
But selling pre-orders for the game at full price when every release date quoted is basically something between a guess and a wish is exactly what the doctor ordered at this techdemo stage?
Hey, thanks! Yep, all three songs (the menu music, in-game soundtrack and the tune in the trailer) are by our resident musician/sound designer Ville Mansikkaviita, and composed specificly for the game.
When the game is finished, we'll definitely make the soundtrack available on cdbaby/bandcamp/elsewhere. I know it'll be a bit of a wait, but stay tuned! :)
It's mostly not in a very similar vein, but Ville's SoundCloud is Soundcloud.com there's a full set he did on a DS-10 while vacationing in France, and some older progressive dusbtep tracks. When not buzy with McBurrobit or his day job, he also does vocals for the Finnish death metal band Human Sculpture, whose work can be found at Soundcloud.com
I think it's evident he's certainly a very musically versatile individual.
Like I said, though, stay tuned, future demos will include new levels, which means new music :)