Making walls

Hi JM -- the way I worked through it was I created a block (Class) called "Wall". Then I had my Player (Class) check for isTouching(). So for example, I would say "if the left arrow is pressed move -5" and then I would check to see if it was touching a wall -- and if it was, I would say move +5 to take away the move. You can look in my recent Zombie scenario. http://www.greenfoot.org/scenarios/9541 I think I'm using the "isTouching" method in this one. If not, the current version does and it will be updated to that shortly.