It all looks very nice! I like your incorporating the Home, Close, and typically left-side icons into the top bars.

I don't see that you've implemented a way to hide and unhide the top bars, which I'd still like for maximizing screen space for the on-top program. If you make a little button for that, I was thinking it would be nice if it could be slid back and forth (or anywhere on the screen, but even in one dimension I think would be adequate) to keep it from obscuring something you need to see or click, and so it should also have a "handle," so that, unlike the standard desktop clock applet, I'm not always activating it when I'm simply trying to move it.

I also would like the user to be able to determine the relative size of the left and right bars. I sometimes get too many icons in the status bar, which results in a drop-down menu for accessing some of them. I'd rather have more room for status-bar icons and have the drop-down menu imposed on the left-bar (your Home/Tasks-Navigator/Apps bar), but I think it would be best if that could be made a user's choice.

It also appears to me that your top bars and icons are larger (taller) than the standard ones (maybe it's an optical illusion?), and even though it looks nice, I know over time I'd mind the loss of program screen-space.

... just my two cents (more than my mother sometimes said I had)