The Jet3d engine is fairly new and still in alpha. I haven't seen many tutorials for programming yet. And the Tutorials that come with the editor are fairly good if you want to get a basic overview & start making some levels. There should be a new release of the engine soon, and after we have a semi stable release you'll see some tutorials pop up. You can also goto the links page on the Jet3d site to find some links to sites with tutorials for Jet3d as well as Genesis.