How to make a platformer game

So people, you you are having trouble getting the camera to follow the guy, YOU MUST MAKE THE INSTANCE NAME "Guy" as previously mentioned to be "guy", not "Guy". This will make it work. If you don't understand where to put:
onClipEvent(enterFrame){
_x=_root.guy._x
_y=_root.guy._y
}

It's the square you made on the stage. Click on it and only it (not he timeline) and push f9. That's where you put that code.
A note to the person who made this tut, please fix that and make it clear. :P

oh, with a } at the end, making it:

onClipEvent(load){
if(MC.hitTest(XVAL,YVAL,true/false)){
do something
}
}

Sorry if the returns ( or \n's dont work)

and where it asks you to do this:

if(MC.hitTest(XVAL,YVAL,true/false)){
do something
}

You should accually write this:

onClipEvent(load){
if(MC.hitTest(XVAL,YVAL,true/false)){
do something
}

That fixes it. Just assign that to the level!
:P

*solution to the enemy code not working:* where it says if(active) it should say if(alive)

It's me AGAIN, me the "constant comment". You should really add a mute button.