Overall: good song!
I love the piano / string riff throughout the song. It's a nice line and helps keep you interested.
There are only 3 small things that I would like to constructively criticize.
-The hi-hat at the beginning sounds a bit awkward. It sounds like the hard hits are on the 'offbeat' when I feel as though it should be on the 'on-beat'. Also, the velocity seems a little too low on every odd hit. It's makes me feel a little anxious or like I'm not quite getting my fill - if that makes any sense. So, perhaps just bring the volume up a bit more. This is only at the beginning though. It's perfect for the rest of the song.
-Second, I realize that it's very difficult to find a good brass sample, but I have to say that the trumpet sounds very digital and a little too perfect. I'm entirely sure how to fix this. Perhaps tampering with the ADSR (Attack, Delay, Sustain, Release) a bit will give it more of a natural feel.
-Overall, especially on the piano and trumpet, there needs to be a little more effects. Reverb, delay, stereo enhancer, panning - these can really help give an instrument depth and a more naturalistic feel. There's a specific part towards the middle (2:35 - 2:50 ish) where the piano needs some reverb and maybe a slight deay - it sounds very dry.
Anyway, aside from all that, I think it's a great track. Well written. There's many things to keep the listener interested. Everything seems to fit well together. Hopefully my review was more helpful than insulting. Take it for whatever it's worth.
Thanks,
Larkeep