If you was going for minimalistic, maybe your active icons would have looked better shiny grey? Just a thought :)

The metal definitely caught my eye. I agree with ggirl, your main-screen icons would look better uncolored, perhaps instead sporting a look of
raised/recessed matching buttons that better mesh with the background.

Cheat icons are stock, not unique, and had I been the one
looking at this in the queue I'd have rejected it for this alone. Create your own, ones that better match the look of the theme. A
better-matching scrollbar would help tie it all together, too. Maybe bolt a rail to the metal frame and have a steel bar "slide" along it? Sort
of like this theme:

http://www.ndsthemes.com/themes/details/t/cec9e2aafd

...just a thought. Overall, a good start and
with a few creative changes could definitely be a great theme.