You're being unfair and need to get off your high horse or your wheelchair. I'm sure the accessibility can be iterated upon the basics of UI, not have to rewrite the whole thing from scratch; this tutorial only covers the basics, can't blame OP for that.

Rather, why don't you make your comment constructive and tell us about accessibility? I am sure there is an "accessibility for noobs" tutorial out there that the rest of us haven't discovered. I, for one, just recently learned about colour blindness in games and was absolutely mad when I saw what the example game in the book looks like to a colour-blind person. Not that I'm much of a designer, but I'll be sure to choose a universally-good colour palette next time I do any UI. So teach us instead of yelling at us.