Heh thanks,

. I will try those suggestions out and see if it fixes my dilemma, what I'm trying to do with the walls is simple in concept, some of the other things I want to try may be a bit more difficult, water puddles that splash when you walk over them, slimes with eyes, that sort of thing

But hopefully I can at least get this first part fixed, I'm trying to color the walls, and possible change their look for later levels, I had downloaded a program that lets you tweak the look GIMP, and I did manage to get it just right, however I couldn't seem to get the game itself to recognize the change or accept it.
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I forgot what I was here to do, but I'll continue to do it anyways.