Construct2 is very young (few monthes), in developpement, few users, few documentation.
The "Platform school" example pointed by harrio requires Construct Classic.
It's been a while since I took a look at it, but on the concept, it should be most of the same in construct2.
On construct2 the best ressource giving you the basic keys to the use of construct2 is the "Beginner's guide to Construct2". From there, you should be able to experiment by yourself.
Last advise, experiment with the "platform" behavior.
Also when you're done experimenting consider writing some documentation. As you say yourself, it is hard to find documentation about Construct2 right now.