That's great that you posted a how-to tutorial, but if I may offer some advice...
If I were trying to follow that step by step, I'd have to pause it several times. Your frames move too fast for the amateur Gimp user, and clicking back and forth trying to follow the steps you're providing would cause even further delay.
Also, if I may ask, what version of Gimp are you using? Your Tool box and the other box (not sure what it's called) are opposite of how they show up in my version of Gimp.
You didn't lose your girl, you just lost your turn!
"In this breed, there's no such thing as an expert! The day someone says they're an expert, they need to walk away from the dogs, because someone's going to get hurt. You should be learning something new every day." John Maynard-Circle M Kennels