The music is quite simple, consist mostly of drones, pads, pipe organs, percussion's and synth. The feel is almost the same throughout the film, and I think it is the directors decision. Hans Zimmer did a great work on the music. It creates a feel of space, mystery and hope. It could be done in a different way but will change the overall feel towards the movie. I personally feel it was the best decision made to have the kind of music. People will remember the eeriness of space and the odd feeling traveling through dimensions.

As for sound effects, its not over the top, just good enough to create a real life reality sounding sound effects and foley. I've watched the making of, and I admit the foley artist did a marvelous job.