Looks great!
One suggestion: When pushing the toggle button the lower screen will switch between different types of layouts. For example:
1. Keyboard on the lower screen. (Just like on your picture)
2. Lower screen filled with black pixels (just like
@elhobbs stuff) besides the toggle button (I prefer this mode)
3. Keep the color scheme of the lower screen intact, but remove the keyboard
4. The last one is probably very difficult. But it is the one I want most. Move/clone/mirror/duplicate/or any other method to make the two menu bars visable at the lower screen. But at the same time have the gameplay window at 400x240