I thought there was really interesting percussion in this song. I agree about the bass, and feel as though the bass voice could be expanded in the following ways: both wider in the spectrum (more mid-frequencies) and more notes/variation so we hear it more often; you might also need to just plain turn it up. I did like the flow of the song in general; it didn't drag or linger too long on any one part. If I had any other critique, it would be that often there was almost nothing in the upper frequencies at all—you could add pads, strings, maybe even a whole other lead melody. I know there was a mid-high "shimmery" pad in there at times, but there is still a lot of room left in the mix.