Scratch

Well, i cant really offer a solution because I am wondering about the same thing, you see, i too am going to make a pacman game, and i need to know this info.

I can guess though, and my guess is that you either use the

 
touching [wall v]

or

 
color [#00FF00] touching [#00FF00]

or you use a completely ghosted sprite that has a

if < touching [wall v]>
end

I hope that helps or a least offers some options,

CAA14

P.S. if any work, please tell me which ones so i can know which is better. 

Say your character moves 10 steps if the D key is pressed, put another IF block inside that IF; saying IF touching colour (of wall) move -10 steps etc. Hope this helped :-)

Ok, that's good to know.
Glad i could help. 
You did apply the "if touching wall" script to pacman right?
If so, that should work as long as the wall is a separate sprite... But if you got the maze as a whole sprite, you may want to make the wall lines a distinct color and use the color approach or try to recreate the wall in it and make it a separate sprite and use the "if touching" approach.

Once you get it working, please let me know... I'd like to see your handiwork. 
BTW, no problem, you had no time limit to respond. 
Regards,


CAA14