If you can get the (non)public test demo of JJ3, you're a lucky guy! With the demo, there also comes a level editor. The problem is: you need a file wich isn't in the zip file. No problem: search at google with the name what you need and there it is! The only real problem is: HOW DO I USE THE UNREAL EDITOR!!? If I would know this, level making for JJ3 isn't a problem anymore (of course there aren't that much tiles that you could use except the ones wich are used in the demo). If anyone knows this, please tell me. There could come a new site, like Jazz3online?