Just went back and listened to the music again. It looks like there are three pieces of music. The one at the intro screen is interesting. I really like that one. Also one of the two that play during the game is quite interesting as well, but the other doesn't really stand out much. It's fine background music but just doesn't really stand out and that seems to be the one that plays more often than the more interesting one. Also it seems the music stops playing after a while and is completely silent until you do something that makes it start up again. I suppose those are the reasons I didn't notice the music very much. The more interesting piece plays more rarely and a lot of time there is no music. But yes some of the music is quite interesting.