Wow
It's really, really great. I write alot of piano stuff myself so believe me when I say this is good stuff. I would have loved to hear a deep, low chord or two thrown in there (maybe in the longer version, which I hope you pursue) and the sudden quick segments are spectacular. Sometimes it sounds a bit weird when you jump tempo like that from a slower one, but you execute it pretty flawlessly here.
[TSR Audio]