Perhaps you could put something big and bright under the main logo. Btw, what's the font used in that? Another possibility is having top and bottom borders to give the text a clean background. Or you could put a black box in, going between the top and bottom borders of the logo. Anything to make the text stand out more.
The OC logo would probably look better at the bottom.
If you could tweak the colour of the green on the backside to sort of match the colours of the leaves on the front side that would probably look good.
Change the unfocused image of Wicket to a focused one.
Increase the contrast slightly on the screen cap where Wicket runs down the stairs, just a little though.
If you yourself altered the front image to make it darker (blacker), perhaps you could revert that just a little. If it was dark from the beginning though you should probably leave it that way.
I like the overall look of the backside a lot. Keep up the good work =)