Interesting, it is smooth/mellow, but also pretty sparse. (nothing wrong with that) The drums seem to be sitting back a little And I know it's the style? But I would vary that snare and hat track up just a little in a few places to break it up a little.
I like the vocals, the bass and key(piano) parts. I'm less fond of the drums (the crashes sound distant and are all at just a couple of timbres and volumes)
Listening again, yes, you need to change up that snare/hat combo, and the drums need to be saturated. I would brighten that piano a bit, and if it's not spread, I would spread it. And the synths in the background seem to be a little too far in the background.
Keep in mind, while this seems like a lot? It's all actually pretty minor. And it's also just one opinion, and I'm not the mix master ;-) But I'll give you an honest opinion.
I do like the song. I think the mix could make it better. But again, most of my mixes suck :-) Overall, good job.