I really learned from this that "6" seems to be the default character. (Interestingly, there is no 6, where you'd expect it, like in the number row or on the numeric keypad, indicating that "6" is not a number.)

Also, is it just me, or is that an illustration style you'd rather connect with the Apple II? Which may be well why the keyboard is placed like it is and may explain the over-all cutesy appearance.