Hmmmm. Some things:

Don't "publish" your script or level.
Just create a new text file, rename it to someScript.c, paste my code.
Change the level name.
Do not copy over any files from GStudio include folder. It finds them automatically (copying them over will break stuff should you ever update your GStudio installation).
Just start the script from SED, for example with the left-most triangle/ play button.

If your GStudio installation is in a subfolder of Program Files, well, that's bad, it shouldn't (I just have it in C:GStudio8 for example). Otherwise it will not be allowed to create files because if missing rights.