Scale every game object according to screen size.

I am creating a 2d game and wanted it to support different aspect ratios. The only easy way I could think about it, is by placing all of my game elements under a canvas. But I have read from the manual that Canvas is generally used for UI. What would be the correct way to do this if I wanted my gameobjects to scale with screen size ( not ui )

 

I am also waiting for good solution by using sprites

 

What are your camera settings? You can control it with the camera in easy ways, but depends on your case.

 

I'm also facing the same issue. Any help would be of much help. How can we control it with the camera settings?