It's a little hard to tell, but I'm pretty sure this isn't a tutorial for invisibility.
You might want to check out some of the other popular tutorials on the site (and other sites) to see how to write and format them. For example:http://fxhome.com/forums/viewtopic.php?t=35277
A tutorial really needs clear, step-by-step instructions that are laid out in a visually interesting and simple manner. So that means numbers, bullet points, headings, lots of images etc.
It's OK to be a little vague if you're talking about general concepts, but if you're being specific then you need to be precise with your instructions. Steps like "down a little bit" are difficult to follow, especially without a visual guide of some sort.
And yeah, make sure the tutorial actually covers the title subject, rather than a completely different effect like a flying take-off.
Thanks for putting the effort in, though - keep it up and I'm sure you'll produce something nifty in no time.