I feel like the waves in the beginning are really centered and separate from the beat itself.
Piano chords are nice, a little... also centered. Try some sort of spatializing doubler plugin, maybe.
You've got a nice little groove by 49. I like the atmosphere.
I would actually bring up your stabbing chords a bit. Although I think they're a little chunky and disjointed compared to the rest of the atmosphere.
I would probably also like a more audible bass than a sine for most portions here. I have pretty generous monitors and the 1:55 section, your glassy tinkles are very loud in comparision to both the bass and percussion. Percussion imo, at least kick and snare, have to do a lot to stand out in a mix.
By 2:28 we're really out of balance. The lead is standing out not because it's mixed in very well but because it's just very loud.
Also, not sure what's going on at the outro. It feels very abrupt.
Overall though I did enjoy listening to the piece. Here from review request.
Some recommendations you may enjoy looking at are the Reaper series of plugins which you can use to clean up a lot of the low end on your instruments and make them sit better in the mix. A lot of people don't realize how much the 250 hz and below bleed on their synths is covering up their basses and kicks. That may be part of the problem here in being able to hear that low sine.