Piano could use a lot more modulation. Track as a whole could use less wet reverbing. Everything is sort of bleeding together. Writing isn't bad, but instrumentation -- the non 8-bit stuff -- needs some serious help. Also, some of the higher frequencies are giving me a bit of a headache. Could be because the mix is so busy, but on the cleaner parts -- where the reverb isn't so obvious, mysteriously, my head doesn't hurt so much.
You really could use some more high end on your drums. Maybe more hats. And some compression. Just watch your leveling in general, and master compression. The high frequency instruments are really sticking out, and your lower frequencies are getting muddied and cancelled out by each other.
Other than that, pretty nice, harmonic piece. There's just a lot taking away from it, particularly generic non-8-bit synths, lack of hi-hats, too much 'verb, and wonky leveling.