I mostly agree with what Monarcheon and Dchris mentioned, but here's some thing no one else mentioned yet.
At 1:30, when finally after all the leading we get a big climactic explosion with exciting string etc. you really should keep that going a bit more before ending, it feels really incomplete and dissatisfying because you end it so early after a really long buildup. I also think you could thicken it with more instruments (horn would fit quite well there I think, or even just more variation in the strings), it felt pretty hollow.
Nice work.