Not so great.
Okay, FIRST of all, I was able to bypass your password with a simple right-click and clicking Forward. It took me to a screen that said the password was wrong, then I hit Forward again.
Also, your images were pretty hard to make out. You don't need to compress them so much since the tutorial relies specifically on them. It's like cropping music to only 20 seconds in a music video.
And finally, this tutorial is really pointless, since anyone who has an extremely basic knowledge of ActionScript and is not a retard could figure out how to make the most obvious of if statements.
Now if you had combined this tutorial with the one that disables the right-click menu (which was undeniably useful, but also extremely lacking), I would have given it a much higher score.