Well, first things first. Your background is a solid purple, so no movement would be noticeable.
You can achieve movement in two ways.
1. Make the player constantly move forwards and keep the window scrolling with it. Either via ScrollTo, MagiCam or just hardcoding it with events.
2. Keep the player stationary (like your capx is currently set up) and move the background instead. This is more similar to how older games do things.
Either one has pro's and con's, use whichever you're most comfortable with. After you've decided which way to go it's simply a matter of doing your homework.