I know it's a rough mix but here's a couple of things that struck me. I'm more of a casual listener than a sound engineer and I listened through headphones.
I wonder if you're in the right key since it seemed like some of the lower notes were out of the singer's range.
Wasn't sure what was going on ~1:18. I thought it sounded like a fireworks rocket going up or something?
The instrument breaks at 1:46 and 3:06 just didn't sound right, as if the tempo was increased for 20 sec or so.
It's a really pretty tune and I do like it. There were just a couple of things that bothered me.