Hey cool!
I found a couple of notational things;
Measure 70: you notated violin 1 & 2 with different rhythmic values, but I think you intended them to be the same
Measure 72: this is the only place I see you use the dotted eight note/sixteenth note rest to indicate the articulation you're after. It seems like everywhere else you used plain eighth notes with just the articulation markings--was this on purpose?
Going along with what Luis said about the introduction, it's well constructed and executed but does seem repetitive. My question is what are you trying to accomplish with the repeats? For example, classical composers would immediately restate an idea with a minor variation (i.e. re-orchestrated, different dynamic level, etc.) to emphasize a point. With your repeats, though, nothing is changed so I feel like I'm covering the same ground twice as a listener. That's cool when I feel like I need another listen to digest an idea further, but here I feel like I'm following it pretty well.
Beautiful work, keep it up!
Gustav Johnson