Very chill, very atmospheric. The music fades into the background as it permeates your existence... In one word: Flow. Love the abstract style, and the mechanics are great for this game. I just have a few minor issues:
1. The game uses subpixels, which is technically against the rules. Sure, it helps the movement feel smooth, but don't think I wouldn't notice!
2. In some sections you are forced to go through a series of platforming puzzles, with no way to go back. I accidentally went back to those several times and had to do them again. Which is great only if you are trying to make a rage game...
But those things aside, this is definitely one of my favorites, great job!