Making a level is easy. But making a good level is tricky. This instructable will help you understand what good N levels are all about, and so open the doors to virtual fame and fortune, and a 38% increase in your popularity.
Step 1: Getting Started
When you unzip the archive, you'll notice there are a bunch of files included with your download. One of these is the N Editor Manual. This is a comprehensive guide to using Ned, the N level editor -- you should definitely give it a read. You can view or download the .doc version here .
So when you're finished reading through that awesome and informative manual, open up N. At the moment, Ned is still in the early stages of life, so it's a little rough around the edges: too rough to include directly from N's main menu.
At the main menu screen, press tilde (~ ) or the vertical bar key ( | ) to pull up the debug menu.