How to add depth to side scoller template?

i want to add depth movement like double dragon to the side scroller template. i also want to just use 2d sprites for all my art assets. any suggestions would be helpful.

Probably depends on your game.
Use camera with perspective checked.
Tappy Chicken, just uses simple vertex shading combined with a colors set in the different sky materials.
If you are thinking bigger, there are ton of tweaks to post processing.

Maybe I should rephrase the question. How could i set up the side scroller to to allow up and down movement like arcade beat em ups?

To make a side scrolling beat -em-up, I’d recommend doing it in 3d and setting the camera to view the players from the side with a very narrow or orthographic angle of view.