Very good start
I really enjoyed this. I think if you built on it then it would sound amazing. (Maybe make it a piano-violin-woodwind trio)
One thing; after 1 min 20 secs when it changes again, you might want to change the tempo to make it seem more epic. Perhaps some syncopation. After the next change till the end it was nice, though the ending was a bit dissapointing.
Other than those, it seems very promising!