I love the background, however like Alex said, the buttons do stand out rather strongly and to me, don't fit in for some reason. It should blend in a little more, in way that makes people feel like it should just be there and that its not part of a menu screen. < sounds weird, i know. BUT, doing a quick google search i found this:

http://www.decane.net/external/bos/diary/13_menu.jpg. And from it you can see what i mean. The menu buttons look like they belong on the background and don't pop out at you so much. But then again if a pop-out look is what you're going for. Stick with it.

I see you're right and i need to change these buttons, i will upload new picture when its done