That's quite a project. I wish I could write something like that. I enjoyed it!
I think the second movement stands out. I like the waltz in minor key, especially the lead up to minute 2 and the oboe/woodwind ensemble bit immediately after that. That was the best part of the symphony for me. For some reason, themes in the second movement reminded me of the carnival level in Banjo-Tooie. I don't know why.
The only thing I didn't really like was how often a quick decrescendo-crescendo was used in the first movement. I am not sure if that's just a function of the synthetic playback, though, or not.