Very interesting sound palette, there's some physical modelling, synthesizers and good variety of percussive instruments. The synth growl at 3:24 sounds like it could belong to a monster in game, but it blends perfectly into the soundtrack. Everything combines into an ambient cloud of music and sound that evolves and drifts in and out. The mix is really good, every instrument has a specific space in the frequency and stereo field. Overall a very well thought out and designed submission.