yello, the scherzo is cute, though relies on the first violin wayyyyyy! too much. You could vary it up and give some of the fun to the other players.
The grave is good though it's build up isn't as, I really like the triplets and dotted eighth notes I was hoping so badly that your melody would intertwangle with that and really get it moving though that never happened and you end it nicely since it is just the first movement I'm not going to make a big wine about the climax not being the best, I'm just hoping the 4th movement is what will bring it up and top it off.
Good job I questioned some of your form but returning to the intro was the most awesome it really left me in a state of suspense and wishing it to grow which you sorta do.
Good luck with the rest
