Here's the official walkthrough (with all levels explained):
http://www.megaupload.com/?d=RJSB22JB
WARNING: You need Microsoft Office 2007 to open this file.
Sorry guys, but is there a software I need to use for Level 12? A walkthrough for Level 11: Press Print Screen and copy it into MS paint. Use the bucket tool and you'll see the arrow. Use the arrow as a reference and start with the number 5. Avoid the purple squares.
Um, I've putted a comment on DeviantART. I've just beaten the GMask level and now, I need help with the phone dial. I know the pattern, it is that, I only don't know the number! Help!