Rozo's right about it sounding 'dark', that's a good word for it actually. considering all the square and pulsewaves in here, i'm not getting any scratchy-ear high frequencies. I want more highs!
the arrangement is good, always evolving, good subtle additions and changes as it goes. the main motif does get a bit repetitive though. the heavier sections are kinda muddy too, there's just so much going on with your chiptune leads and harmonies, piano, bass, strings, etc etc. check out your EQ's on every instrument and cut any frequencies you don't need.
the drums kinda weak, could use more punch and variation in the rhythms. a little drowned in reverb and delay too. i know its a stylistic thing here, especially with the kick- it might not be so much of an issue if you can clean up the rest of the soundscape a bit.
overall, a little rough production-wise, but the arrangement is pretty promising. keep it up!