Snifberg wrote:how can I make permanent changes while playing? For example 1 level has something blocking a path that can only be moved by a switch from a diferrent level?
You could combine two levels into one .lvl file and use SMW stars to trigger permanent events. It isn't too complicated as long as you know what you're doing. Here's an example (test in Start Game):
http://www.mediafire.com/download/ial0r ... castle.zip
At first, the GFX part of the hub is "coming soon," but after getting the star in Totaled Castle (which is actually part of the same .lvl file), the GFX part of the hub is "completed" and has items.
Depending on how you make the episode, you'll probably have to combine different parts of different levels to achieve what you want.