The cubes illustrate a move sequence, which you can go through forwards or backwards using the VCR style buttons below them.
You can rotate the whole cube by dragging it with your mouse.
You can turn the sides by clicking on them while holding down the shift and/or control key. Shift is clockwise, control anti clockwise, and both gives a double turn. If you do this you will get out of sync with the move sequence (I will fix that someday), you can always reset with the fast rewind button.
There are several different coloring schemes on available Real World cubes. I use the one I learned the cube with. It is forever programmed into my whole being.
It is known as the "plus yellow" coloring, since green (blue + yellow) is opposite blue,
orange (red + yellow) is opposite red, and yellow (you get it...) is opposite white.
Maybe someday I'll figure out how to make the coloring settable by the viewer, but
for now this is how it is.
I also use grey for faces that are uninteresting for what I'm illustrating, and dark gray for the already solved block of the cube. This is pretty much the way I think of the cube when I solve it.