Glad you liked it.
I havent't release the source code yet. I'm meaning to do it, but first I'm getting around to cleaning it (it's a bit over complicated).
This is so helpful. I've been using game maker off and on since 4.3... more off than on as I started using C++ and C# more. But I can see you have some DLLs and your credits generator is the icing on the cake.