Engrish
Yeah, Usefull info. problem, too basic. These are things that almost every coder should know. If they dont, then this tutorial probably wont help them out much cause this would still be over their heads. Also, Check your grammer. "Dragging code are simple!" thats not the only example i found either. However, If i tell you where they are, you will fix thouse, and leave the ones i missed.
Overall suggestion: Perhaps haveing yoru tutorial divided up into a few difrent sections (Beginner intermidiated advanced) would help a little more. These tips i think would be under intermidiate. Beginner would be something like.... ok, i guess a few of these would be beginner. Like setting an objects X and Y coords.
Also, what version of AS is this? Cause im useing AS3 and its mouseX and mouseY when i do it. I guess thats also something i would add.