That is really cool. Very well done, great interface.
I think you need to up the contrast and provide a bit of direction.
First of all, it looks very washed out. I don't mean that you need huge bold colors, but it has a color scheme (or lack there of) which makes it difficult to pick out the objects. At the same time, I think you should stick with the simple design, just a bit of texturing and color I think would both improve the character, and even the usability (though I don't see how it could get much more usable).
Your product defines 'simply, awesome'!
Congrats