This looks a bit like turtle graphics/logo

http://en.wikipedia.org/wiki/Turtle_graphics

LOL. Before I read that wiki, I did not know that only one of those
three words (turtle graphics/logo) meant what I thought it did.

But I agree. Its one of the first games I have found that is
challenging and fun, while the educational benefits are obvious, but
not too obvious.
........

My son first learned about computing through turtle graphics/logo.
He ended up using it to put together a basic video game, a war game,
of course, betw a tank and a warplane.