How do I move?

I am still learning the basics of Unreal Engine. I am using the SideScroller 2D. I started with the starter content, so that I can tinker around with it, and learn a few things. When I click the “Play” button at the top to begin moving, I can jump up and down, but I cannot move from side to side.

Should be able to move left and right by pressing A and D. Just started up the project and without changing anything that should be the default controls.