While I'm not Swamp, a format that I've always wished existed in language tutorials is one of this nature:
A list of all the available commands in the language, each accompanied by a short description of what they do. Then, there would be some advice on how to use those commands in creating different types of engines.
For example, after explaining string manipulation commands, there could be a small section on using them to make an inventory engine.
I've always thought that something like that would be more helpful than a tutorial, because instead of just following someone's instructions you have to think about how to take the advice and use it in accordance with the commands.