Ah, I can't forget about levels with multiple exits. If a level has exits that are more steps away from where you start than you the number of steps ...
I think this is great for noob training.
Perhaps it could go in a special Collection, titled: ''If you're having troubles, but don't want to just give up'' (or something simmilar).
There would only be levels that have text explaining things, along - like this one (underling has quite a few of such levels, too, if I remember correctly).