Hi friends, I'm working on this track

https://instaud.io/h6k

Most of the music I've made in the past has been kinda ambient-ish but I'm trying to learn how to mix music that's a little more complex, has more of a beat to it, lots of stuff going on in different ranges, etc.  Could really use some advice on mixing this, especially the idea I've started at the end of this mp3, or any other suggestions you have for anything I could improve.  Thanks!