First chain the Counter Display to the Counter Set and leave only the counter set to Execute on Page Load.
Secondly chain to the Counter Add a Counter display also, so when you add to that counter it's value will be updated

We are working on a new feature for the narration audio that will be available in a future version.

That bug will be fixed in the a future version of the builder.

Here is a sample app where the background is scrollable and the elements have different behaviors:
101 - Scrollable page.zip

Sorry I was using a different version of interact builder. This is the correct link for the sample app for memory and match game:
100 - Memory game.zip

What version of Interact Builder are you using?

The difference between match game and a memory game is that on the memory game all the elements are covered, so you will need additional mask/maskoff behaviors for it. I've attached to this post a sample app with two pages: page 1 a match game and page 2 a memory game. Let us know if you have any other questions regarding memory/match game. 
104 - Match Game.zip

We'll create a sample app for this and will post it to this topic.