I am providing you my handmade and for your game. Parallaxing means, It will move the assets in the Z axle, and It will give you the deepening, and a like the background is moving effect, you can change It's fastness, and the number of assets that you want to involve in the parallaxing. The tiling means, if you run out of the background, foreground, midground etc.. It will flip the asset, and generate you a new one, whit perfect positioning and giving the feel that a completely different object. The camera follow scripts is simple as hell, just give it to an object and the camera will follow it, It's simple but important. I feel like its a pretty important part of a good designed professional game!