О! One of the types of music I love ^^
1 part - creepy, bassy sounddesign.... awesome!
2 part - amazing mood change. It... inspiring?
Part 3 - Wind... and bells. Sad :>
...
AAAAAAAH EPIC
Oh, sorry...
4 - part - EPIC. Drums, piano and a whole stew of sounds ready to make me jump out the window and run to the mountains (They're not far away, by the way. lol)
In summary, I'd like to say cool sound design. The only remark - a little bit dull drums in the mix.... (maybe because I have a fetish for drums ¯\_(ツ)_/¯ ). But still - cool job!
P.S. What time signature did you use?