Well, you were right, I tried again a bit later, and here's what I got :
Kinda weak compared to what I've seen here...but I like it.
However, when I tried again, when I got to the flattening part, I couldn't see the text because of the clouds! Why?
Damn, I hate this...just started using Paint.NET and...this tutorial really is hard to use. I can't even make the fire...and I don't understand most of the things there...