Hello everybody,
The files in this folder are all related to Game Maker, a program developing program that was designed by Mark Overmars that allows for program development, mainly geared toward gaming, with more ease than using other programming languages such as C or C++.
You need Game Maker to effectively open .gmd and .gb1 files. You can get it at http://www.gamemaker.nl.
Feel free to download and use these files, and modify and make changes to source code files as long as you don't claim ownership of any of them. If you modify a Game Maker source code file that was not created by you and found at this page, you may not redistribute it, however, you may send it back to me and then I will redistribute it, giving appropriate credits. You are responsible for your use of these files. Everything here is free for your use, though.