After playing with Spectre for a while, I decided to check the resource fork to look for things that could be modified. To my surprise, the obstacles on the game grid were neatly stored in 'wrld' resources and a ResEdit template was provided so that I could interpret the information. It looked like the folks who wrote Spectre expected people to dig into it. Well, great, but it was still just a load of numbers. To modify anything in any sensible way, you would have to map everything out on graph paper and then type in the locations of everything afterwards. What a drag...
So, instead of doing that, I wrote this program so that all you have to do is point and click to place new obstacles and drag the old ones around.
I also noticed that the colors were neatly arranged into 'clut's, so, of course, I had to get the program to edit those too.