Main Menu Mockup:
(I know it's dark.. for some reason the colors get set to grayscale in PS.. I was in too much of a rush to fix it.. I'm looking more at the layout)
Game Window Mockup:
1) The 3d world will be displayed in the main screen.
Numbers 2 through 5 are 2D HUD elements, with some level of transparency
2) Menu options will be displayed on the left side of the screen
3) This is an all-purpose area that will display
4) This is the area that will display information about the selected card.
5) This is the area where active cards will be displayed. A certain amount will be displayed on screen, and you can scroll to get to the rest.
Menu System Mockup: