[Flash 8 AS2] Need help with tile based movement

I have been reading Tim Hely’s RPG making tutorial here on kirupa, and it has been really helpful. It’s the only decent tutorial for tile based programming for AS2 that I have found.

I have been trying to change the code so that it’s the ground that moves while the character stands still. That to create the illusion that the character is actually moving and that the screen follows him, since my experiences with having a camera to follow the character are that the camera tends to mess up everything.

I can make everything to move, but the character is not hindered by the tiles. I have tried everything I can think of, but I can’t really figure out why it doesn’t work. The only part of the code that I don’t fully understand is the math part, so unless some major changes to the code need to be done the problem might be there. I can’t see why it wouldn’t work, since if it checks if there is an obstacle in front of the character before it moves the map downwards it should work, right?

And i also noticed that the tutorial is 6 years old and ends at page 7 even though it is written on the last page that the tutorial isn’t over, does anyone know why no more pages were written?

If you know any good tutorials about tile based games for AS2, could you link to them please? They seem quite rare. :-/